Sell your car buy a turbo car.
To answer your question the list is long, the work is time consuming, and the total process is expensive to do it right. Your focus in the post seems to be motor; Turbo cars have a lot of upgrades that allow the vehicle to be balanced; calipers, rotors, bias valve, brake cylinder, gearbox, clutch pedal assembly, driveshafts and hubs, wiring, ecu, alternator, fuel pump, radiator, exhaust, sway bars, intercooler, and on and on.... and then engineering...
Why do you need a st215? why not a 2gr? why not a st165? drag racing or sprint or sjust street racer? whats the end goal?