Exactly what you stated. Jewish is a religion. It stems back from the roots of Abraham and Isaac in the Old Testament scriptures. Jewish people are highly rule regulated and the main population of them is Israel where 75.4% is Jewish.
The sacred scriptures of the Jewish Religion are the Torah, Prophets, and 'Writings', corresponding to the 'Old Testament' up to the books of Chronicles, plus the 'Megillot' of Esther, Ruth, Lamentations, Song of Songs, and Ecclesiastes.
If you wish to believe in the religion of those scriptures, they explain the origins and principles of the religion.
Genesis, from the end of ch.11 until ch.25.
Leviticus.
Yes, the Jewish Bible is composed entirely of Hebrew scriptures, with the exception of a few passages in Aramaic.
The Tanach (Jewish Bible) is written in Hebrew.
genesis
The first Christians were Jews and were accustomed to Jewish scriptures which became Christian scripture as well.
bible
To be Jewish can mean you either practice the Jewish religion, or are from a Jewish decent. It is both a race and a religion. Someone that is culturally Jewish may not practice the religion, but has a Jewish heritage. Likewise, people that do practice the Jewish religion do not have to be culturally Jewish, or have Jewish ancestors.
there is no penecostal religion in the scriptures, clarify!