Sahifay of Hazrat Ibraheem AS has been lost in history. we cannot know about them.
About torah
If you accept the idea that majority of torah has been changed then its easy to answer. Also, we know from Quran that, their scholars has definitely tried to hide some information given by Allah.
Since Ghamdi Sb do not agree that there have been changes in Torah or injeel so let wait for scholars reply.
while searching I found this intresting paper. May be u can read as well
https://link.springer.com/content/pdf/10.1057%2F9780230375970_5.pdf
as summary, according to it, jews consider hell and heaven as abstract idea. However there are some words which have been interpreted as hell.