welcome.
Good choice on looking for a Golf.
With the Mk3 watch out for dodgy electrics;
abs errors (some people just disconnect the ABS light to stop an error showing, the light should go on when you start the engine, and then go off. If it doesn't go off, or doesn't go on at all, probably means an error and a repair needed, don't believe the "just needs a bulb" excuse.
electric windows are prone to faults.
16v engines can be troublesome with dizzy's and stalling.
gearboxes can be a problem, fairly common on VWs of this age. Beware if it jumps out of 5th gear.
rust, look around the tailgate, wipers and arches.
I'm sure you'll find more tips in the Mk3 section.
