Anything and everything if it's not been looked after properly.
That's an old car, so if your considering purchasing it make sure it has an immaculate service history.
If your not a 'spanner' then have it checked over by a mechanic. That might save you lots.
Some had bad timing chains and others have bad owners who don't change the oil.
Service history, overall condition, and personally I'd look for one with the 4 speed automatic cos they are cheap if it ever needs replacing.