i would do gears, that will really wake the car up and tide you over until funds allow you to get a charger, my advise would be the KB

 

If you buy an S/C kit it will come with everything you'll need. It comes with a programmer but it's suggested that you get it dyno tuned.

 

1) Cut your factory springs.(i'm sure you have at least one friend who knows how)
2) Rear control arms. install when you do the springs.
3) MGW short shifter(30 min install. Easy)
4) Rear gears(Have prof. done)
5) Supercharge that b@#$%!!!!!!!

 

well like said before if you buy a kit it will bring almost everything you need. but the major things some kits dont bring are injectors,fuel pumps, and mafs.im sure some kits include them but if you just want to buy something that will help when the time for a s/c comes a svt focus fuel pump wouldnt be a bad idea.