If you get a turbo the intake and header will have to go. The exhaust you have probably also doesn't flow enough.

Personally I would take a more balanced approach. Get some actual sticky tires (Toyo FZ4 does not = sticky). Get some shocks and springs, maybe a larger rear swaybar. More aggressive brake pads. Enjoy the improvements you feel in all aspects of your car's performance. That should keep your spending occupied for a while at least.

Afterwards once the rest of the car is upgraded, slap on a turbo kit and get an upgraded clutch; that is if you still feel like putting the time/money/effort into this particular car.