I agree with the above except for the alky.I would be hesitant to use alky if you don't have prior tuning experiences with these cars. Mid 12's are cake on a stock everything TR. Tuning alone should get you there. Once you've mastered tuning the stock parts, then upgrading and tuning should be alot safer. A scan tool is a must, ascantool you can record with and play back later is even better.
scantool..................................$250
fuel pump................................$100
hot wir kit................................$50
adjustable wastegate..............$10
adjustable fp regulator............$100
aftermarket boost guage.........$40
fuel pressure guage.................$50
K&N...........................................$50
total..........................................$650
That's all new prices. If ya wanna go used you can do even better. After that i'd go injectors to complete the fuel system, than an exhaust. After that you can get the flow in and the flow out, have enough fuel ,and tuning capabilities to add a larger turbo.