The texts which Noach learned from were what he received from his ancestors.
There are remnants from three seforim which we still have today. They are 1) Sefer Raziel HaMalach also called Sefer Toldot Adam and Sifra d'Adam Kadmah which was given to Adam after the sin of the Tree of Knowledge of Tov and Ra by the angel, Raziel. It was through this sefer that human beings were taught the avodah of Teshuvah. This sefer also has teachings about Tumah and Tahara.
2) Sefer Chanoch from Chanoch ben Yered, the father of Methuselah. It is often bound together with Pirkei Heichalot of Rabbi Yishmael HaKohen Gadol because many of the teachings Rabbi Yishmael recorded, he received directly from Metatron (Chanoch after he has been appointed leader of the Angels).
Like Eliyahu HaNavi, Chanoch did not die in the normal sense of the word, but ascended alive. His material, physical body was sloughed off to reveal only his angelic body. He assumed the role of being the leader of all Angels and took on the name of Metatron, Sar HaPanim (מטטרון שר הפנים).
This angel was known to all nations and was the source behind Batya giving Moshe Rabbeinu his name. It is the Rosh Teivot of Metatron Sar HaPanim, who appeared and spoke when Batya looked into the basket that was taken from the Nile. Batya recognized this angel and declared, 'Moshe' (Metatron Sar HaPanim).
3) Sefer Noach which contains Noach's chiddushim to Sefer Raziel which he learned during his time on the Ark.