As Salaamu Alaykum Shaykh.
A. Shaykh were The Tawrah, Injeel, Zaboor each all revealed completely and conveyed completely by The Messengers that each Book was revealed to so that all the Tawrah (without exception) was revealed to Prophet Musa and he conveyed all of it (without exception), all the Injeel (without exception) was revealed to Prophet Isa and he conveyed all of it (without exception) and all the Zaboor (without exception) was revealed to Prophet Dawud and he conveyed it all completely (without exception)?
B. Did Prophet Isa also convey The Tawrah in full (without exception) and was it revealed to him completely (without exception)?
C. If someone claimed that The Qur’aan was not fully revealed to Prophet Muhammad ﷺ and/or they said that he ﷺ did not convey all of it has such a person committed kufr and become a kaafir?
D. Did Prophet Ibrahim and all The Prophets and Messengers (without exception) who had a revealed book, were the Books revealed to each revealed completely and did they convey all of the Book that was revealed to them (without exception)?