um mate...first of all....do a search...ill tell u what i know but im sure that other ppl know better about a drift set up as mine is just a street car
second of all....u wont be drifting anything with the 4ac, except maybe in the wet....even 4age 16V u need considerable skill so i recomend that u dont think of drifting just yet...make ur car handle
a good start for ur "stage 1" would be to get some king springs and kyb shocks...if u want drift then swaybars also...plus roll center adjusters and braces....it all depends on ur budget
i run a trd 2 way lsd and i think its fantastic but i have been told that cusco rs is much better (either way budget over 1K just for a new center)
im running jdm rotors on the front but this needs an upgrade, not that it matters as i use engine braking more then brakes
but before u do anything....just read lots of posts....use the search and yeah....it will help u to avoid looking like a tool