do your maintinece all around first and fix your body making it look a little decent at least.
do a compression check and update or replace all your major motor/trans components(water pump, timing belt, clutch/flywheel, etc)
dont boost this car in the condition you are describing cuz then people will look at you the way you looked at ricers with beat up hatches and loud exhaust.
id try to do a lil research for this. but we are glad to help. try this link it gives you an idea. let me know if it doenst work......
read this whole site............
Ross' Probe GT Performance Page
then read up on the install......scroll down and read the steps.
My Turbo Installation
takes time and money...beleive me.
it took me over a year to build my kit and finally im ready to install it after i put in my clutch and flywhl......and over 2500 on kit itself. plus all maintenence and aftermarket parts. and over 7k invested. and it still looks stock.
and of course, a KLZE (jdm swap) is another alternative for you with those miles. search.