Thanx man, but what should I search?? I searched "golf recurring issues" but it just came up with problems people had with their Golf, but doesn't say whether they happen across the mk2 range 
I wouldn't have known what to search for when I was new to the forum either as it relies on the exact phrase being used.
I mainly used the matey-matey buying guide when I was buying mine. Some other things that can be expensive to remedy:
1) FULLY check the alarm/immobiliser making sure it works flawlessly.
2) Check for stem seal wear.
3) Make sure there no play in the steering.
4) Check reverse gear and also full lock.
5) Check the sill's for rust.
6) Always check it starts from stone cold.