The car should have little corrosion unless there is accident damage, but do expect some corrosion to be present on the rear axle (torsion bar set up.);
Fortunately, items such as brake parts and other service items are cheap, and its an easy vehicle to work on.
The odd point.....the gear linkage has a couple of ball jointed rods that tend to pop adrift, and leave the car stranded
so if the gear lever feels like a pudding stirrer, consider that;
They like to have genuine catalytic converters fitted, so if the engine management lamp is on, beware;
The interiors aren't particularly strong, and the seats tend not to hinge on a 3 door model;
Oil leaks around the cylinder head joint will need attention;
The power steering is electric, so swing the steering wheel, engine on, listening for groaning sounds;
Check all electrical items, especially the rear lamps;
If there's a sunroof, feel for wet carpets, and check the boot area anyway;
Start up from cold, look for smoke- and the engine should settle down to a fast idle quickly;
The clutch isn't the most robust of items, and should have smooth pedal travel and no slipping;
Ask for both keys, and try both using the central locking;
Ask if a new timing belt has been fitted (a new water pump must be fitted at the same time).
If the ABS lamp is on, then vanish
Ensure the airbag light goes out immediately too.
Ideally you are looking for a vehicle that's had only a couple of owners, obviously cared for and unmodified - if there's such a thing!
Be lucky
John