T4 looks pretty amazing, and I'm fairly certain that Lua > C even though I don't know Lua just yet.

With Angband and variants at least I have access to editable files, and the source is easy to locate and modify (if more than a bit convoluted). I can't find anything in the ToME dl packages except a tree of examples, which while thorough, haven't revealed enough to me yet.
My questions are these:
0) Is T4 set up so generically that you have to create the code for things like character stats, attacks, movement, anything-other-than-basic-UI, etc.?
1) Is there a library of monsters, spells, images, actions, etc. that we can use, or does all this need to be created from scratch? If this is available, where is it?
2) What you would recommend in my situation?
Many thanks for your time and response!