how much time between adam and yessua ?

The Question of time and Adam and Yeshu is a complex one.

For Gnostics (and some mainstream Christians) the figure of Yeshu appears before the “new testament.”

For Gnostics we find that Christ is an emanation, a divine aeon.

Aeon: These are characterized as emanations from the ‘first cause,’ the Father in some Gnostic schema. The word not only refers to the “worlds” of emanation, but to the personalities as well. Sophia, Logos, and the other high principles are aeons. ”A link or level of the great chain of being, the sum total which is
the ‘All’ or Pleroma…Can also mean a world age.” (See; Gaffney) ”According to other Gnostics, for example Valentinus, the first principle is also called Aeon or the unfathomable, the primeval depth, the absolute abyss, bythos, in which everything is sublimated…” translated by Scott J. Thompson from G.W.F.
Hegel’s ”Vorlesungen über die Geschichte der Philosophie ii ,” (Theorie Werkausgabe, Bd. 19), Frankfurt a.M., Suhrkamp Verlag, 1977, 426-430] ( See also; Pleroma.)

Thus Christ and his consort, Sophia, are to be found in the Eden story.. for it is Christ and Sophia that are the serpent. Through the serpent Adam and Eve learn they are in ignorance, trapped by the Demi urge (Samael who’s name means ‘blind god’).

But back to Adam….
When we think of Adam there are two adams, the primordial adam and the seperated Adam.
The primordial Adam is “complete” and is reffered to as Adam Cadmon in Jewish mysticism for instance

from Wiki

In the religious writings of Kabbalah, Adam Kadmon is a phrase meaning “Primordial Man,” or “Primal Man,” comparable to the Anthropos of Gnosticism and Manichaeism. However, in Lurianic Kabbalah, Adam Kadmon acquired much more exalted status, equivalent to Purusha in the Upanishads, denoting the Manifest Absolute itself, while ‘Adam Soul’, the primeval Soul that contained all human souls, is described in different terms in this variant of mythopoetic cosmogenesis and anthropogenesis. It is said that Adam Kadmon had rays of light projecting from his eyes. There is also a similar concept in Alevi and Sufic philosophy called Insan-i Kamil, the Perfect or Complete Man.

Primal man…. Adam of course becomes “seperated” and forms a duality, of Adam and Eve.
Here we find the goal of many “spiritual” paths, to obtain unification, completeness and the return to the primordial.

As Thomas Aquinas said:
There are only 3 movements in the universe

The circle, female
The Line, Male

and
Obtuse, the serpent, lightining, the Christ.

Thus we see the primordial Adam is the serpent, composed of the male and the female, both and yet neither.
In Gnosticism we see this in the figure of Seth. Thus Adam forms adam and eve, then we have cain and abel and various daughters(depending on who’s version you are reading!)…who are all unified, back through a marriage of opposites in the figure of Seth.

”From Adam three natures were begotten. The first was the irrational, which was Cain’s, the second the rational and just, which was Abel’s, the third the spiritual, which was Seth’s. Now that which is earthly is “according to the image,” that which is psychical according to the ” likeness ” of God, and that
which is spiritual is according to the real nature; and with refer­ence to these three, without the other children of Adam, it was said, “This is the book of the generation of men.” And because Seth was spiritual he neither tends flocks nor tills the soil but produces a child, as spiritual things do. And him, who “hoped
to call upon the name of the Lord” who looked upward and whose “citizenship is in heaven – him the world does not contain.” (Theodotus, Criddle Collection.) (SGG)

For Gnostics Yeshu is then a further echo or “reincarnation” of Seth….
This is of course further confused when you consider Docetic ideas of Christ..which I personally dont agree with, as Philip tells us that:

“Jesus took them all by stealth, for he did not appear as he was, but in the manner in which they would be able to see him. He appeared to them all. He appeared to the great as great. He appeared to the small as small. He appeared to the angels as an angel, and to men as a man. Because of this, his word hid itself from everyone. Some indeed saw him, thinking that they were seeing themselves, but when he appeared to his disciples in glory on the mount, he was not small. He became great, but he made the disciples great, that they might be able to see him in his greatness.”

So the question how many years between Adam and Jesus is one we can consider if we are fixed on times and dates and history. One would argue the bible says an X amount of years, for arguments sake, lets say 5,000. But as Gnostics, history is always secondary, our texts, our cosmology are ways of understanding, a means to an end; they are not to be taken dogmatically or to be used literally alone…for as Gnostics, we must scratch below the surface “If you wish to obtain pearls, you must dive for them.”

Docetism: Meaning “image.” Docetic refers to being non-corporeal, or not being composed of matter. (See; Julius Cassianus.)

Barbelo (BARBHLW): Generally the first aeon, body or voice in the Sethian creation myth; “the first virginal emanation,” it may have an androgynous connotation, but represents a Gnostic version of Yin, and Yang, and the sexual energy called ‘Jing’. (See Allogenes, Tractate 3, Codex XI, of the Nag Hammadi
Lib. See also: Pistis Sophia,
Ch. 8, BK 1, Askew Codex. See also: ”Apocryphon of John,” ”Marsenes,” ”The Gospel of the Egyptians,” ”Melchizedek,” ”TheGospel of Judas,” Trimorphic Protennoia,” ”The Three Steles of Seth, and Zostrianos”) “I cast into her the first power which I had received from the
Barbelo, which is the body which I wore in the height.” (”Pistis Sophia”) ”And I saw holy powers by means of the Luminaries of the virginal male Barbelo telling me that I would be able to test what happens in the world:” (Allogenes) ”Great is the first aeon, male virginal Barbelo, the first glory of the invisible Father, she who is called perfect.” (”The Three Steles of Seth”) ”O Mother of the aeons, Barbelo! O first-born of the aeons, splendid Doxomedon Dom[…]! O glorious one, Jesus Christ!’ (”Melchizedek”)

“She requested from the invisible, virginal Spirit – that is Barbelo – to give her FOREKNOWLEDGE. And the Spirit consented. And when he had consented, the foreknowledge came forth, and it stood by the FORETHOUGHT; it originates from the thought of the invisible, virginal Spirit. It glorified him and his perfect power, Barbelo, for it was for her sake that it had come into being.

“And she requested again to grant her INDESTRUCTIBILITY, and he consented. When he had consented, indestructibility came forth, and it stood by the thought and the foreknowledge. It glorified the invisible One and Barbelo, the one for whose sake they had come into being. “

And Barbelo requested to grant her ETERNAL LIFE. And the invisible Spirit consented. And when he had consented, eternal life came forth, and they attended and glorified the invisible Spirit and Barbelo, the one for whose sake they had come into being.

“And she requested again to grant her TRUTH. And the invisible Spirit consented. And when he had consented, truth came forth, and they attended and glorified the invisible, excellent Spirit and his Barbelo, the one for whose sake they had come into being.

“This is the pentad of the aeons of the Father, which is the first man, the image of the invisible Spirit; it is the forethought, which Barbelo, and the thought, and the foreknowledge, and the indestructibility, and the eternal life, and the truth. This is the androgynous pentad of the aeons, which is the decad of the aeons, which is the Father. Apocryphon of John

The Barbelo

This Gnostic figure, appearing in a number of systems, the Nicolaites, the “Gnostics” of Epiphanius, the Sethians, the system of the “Evangelium Mariae” and that in Iren., I, xxix, 2 sq., remains to a certain extent an enigma. The name barbelo, barbeloth, barthenos has not been explained with certainty. In any case she represents the supreme female principle, is in fact the highest Godhead in its female aspect. Barbelo has most of the functions of the ano Sophia as described above. So prominent was her place amongst some Gnostics that some schools were designated as Barbeliotae, Barbelo worshippers of Barbelognostics. She is probably none other than the Light-Maiden of the Pistis Sophia, the thygater tou photos or simply the Maiden, parthenos. In Epiphanius (Haer., xxvi, 1) and Philastrius (Haer., xxxiii) Parthenos (Barbelos) seems identical with Noria, whoplays a great role as wife either of Noe or of Seth. The suggestion, that Noria is “Maiden”, parthenos, Istar, Athena, Wisdom, Sophia, or Archamoth, seems worthy of consideration. http://essenes.net/gnostikoi.html

further: THE GNOSTIC THREEFOLD PATH TO ENLIGHTENMENT The Ascent of Mind and the Descent of Wisdom Novum Testamentum XXII, 4 (1980) by JOHN D. TURNER

Sethian Gnosticism a Literary history by JOHN D. TURNER

GNOSTICISM AND PLATONISM THE PLATONIZING SETHIAN TEXTS FROM NAG HAMMADI IN THEIR RELATION TO LATER PLATONIC LITERATURE by JOHN D. TURNER

TO SEE THE LIGHT: A GNOSTIC APPROPRIATION OF JEWISH PRIESTLY PRACTICE AND SAPIENTIAL AND APOCALYPTIC VISIONARY LORE

Achamoth: In Hebrew meaning ‘wisdom,’ possibly related to the Hebrew word for wisdom, “chokmah”. An Aeon representing ‘wisdom’ created by Sophia (Wisdom) in the pleroma. (See; ”First Apocalypse of James,” Nag Hammadi Lib.) Called ‘Echmoth’ in the ”Gospel of Phillip,” meaning ‘little Wisdom’ or “wisdom of death.”

Further:

https://magdelene.wordpress.com/2007/04/01/basic-sethian-christian-history/
https://magdelene.wordpress.com/2007/03/30/steles-of-seth-part-1/
https://magdelene.wordpress.com/2007/03/31/the-second-stele-of-seth/
https://magdelene.wordpress.com/2007/04/03/steles-of-seth-part-3/
https://magdelene.wordpress.com/2007/04/03/secrets-of-the-sethian-monad/
https://magdelene.wordpress.com/2008/06/02/understanding-the-secret-christianity/
https://magdelene.wordpress.com/2008/01/08/aeons/
https://magdelene.wordpress.com/2008/01/08/pleroma/
https://magdelene.wordpress.com/2008/01/08/the-demiurge/
https://magdelene.wordpress.com/2008/01/08/sophia/
http://www.archive.org/details/AGCA_radio_march06
http://www.archive.org/details/AGCA_august_2006_Broadcast
http://www.archive.org/details/Gnostic_Gender