Mate spend a few hours seaching and you will find all the nfo you need on a basic drift setup..
But I'll melt it down for you. If I was in your position I would be looking at these mods in order.
-Diff
It is possible to have your stock LSD 'shimmed'. This tightens the feel of the diff. Downside is the diff will usualy only last 1 maybe 2yrs after that if it dosen't cop too much abuse. Cost is around $250-$300
Better option in my opinion is a low km aftermarket 2-way. Expect to pay $750-$900 for one of these.
-Coilovers
I prefer the usual jap brands to the cheaper ones floating around. Some people say they are getting good results with the new cheaper stuff like HSD etc. New for the price I reckon its hard to go past Racing Logics. Around $1600 a set. If you are looking at 2nd hand be sure to find some in good condition, or factor in $150 odd per corner for a rebuild.
Spring rates look at either front 8k, rear 6k or front 9k, rear 7k for a daily driven car.
-Castor rods, Rear camber arms, and subframe bushes.
Simple pieces of gear, generic will do fine. Prob $500ish all up
Also a simple round steering wheel will be helpful along with a supportive seat.
Have a look on Secretdrift.com in the tech section.. Heap of good info in there.