Once you get it sealed from the weather address the mechanical that will make it reliable and safe.
Go through the brakes to get them working correctly and replace the fluid.
Ground points are notorious on the 02 so look in your manual to find them and inspect and clean them. Add a ground from the back of your instrument panel to the metal behind the dash.
Check all the rubber bushings and replace if needed. Check the ball joints,tie rod ends... for play. I am guessing you need new tires.
Make sure you have a second set of keys made if you don't have a second set. Your dealing with an old car and old keys.
The headlights are not very good and a set of Hella H4 headlights really make a difference.
Do a general tune up and adjust the valves.
Change the fuel and air filters and all fluids.
Check the bushings on the alternator. The stock set up does not offer allot of extra charge so you want it in good shape.
Clean the fuses.
If it runs a little hot swap the stock radiator for one out of on E21.
Does the heater fan work? Some times you can nudge it and it will free up. Otherwise you will need to replace it.
I found the crank case ventilation tube to be lacking and I replaced id with an after market filter.
Inspect the quibo (not sure about spelling).
Clean the window tracks and regulators and grease. There is most likely 34 year old gunk were grease once was and if left go it causes undo stress on the gears.
Find a parts source and start collecting parts.
What carburater is on the car now?

John Hoffner
_________________
Cars - I'll look in the driveway and let you know later.