Sorry, I can't answer any of that.
The Hebrew Scriptures are the same books as the Protestant canon of the Old Testament.
Catholics and Eastern Orthodox Christians also include in the Old Testament some additional books which are preserved in Greek only (although in at least one case the book was originally written in Hebrew, namely Sirach or Ecclesiasticus). There are also some additions to Daniel which are in Greek only, including the story of Susannah and the elders.