lookin for a celica

i am looking to buy a celica GT-s with a six speed, i like the 00 and the 01. i want to totally trick it out. i would like to get about 250-300 hp out of it. what should i add and what year should i get? any help will be greatly appreciated i am new so go easy plz

cold air intake, redone exhaust, ingnition system, headers, manifold, performance muffler, some NOS (100hp right there), pull extra wheight out of the car (spare tire, jack), turbo, performance chip, and a dream and about an additional $5,000.