Where to start? The fuel injection wires were frayed, had to replace them, ($250) The air intake had a small hole in it, had to have it replaces ($280) Spark plug wires twice ($89.95 x 2) Radiator hose (Audi dealer wanted $100, I made my own for $9) Wheel barrings were replaces twice ($350 x 2) And the grim reaper came and took it finally and took out the trans-axel and the clutch. (est. $2300) The car did not like our cold Minnesota winters, and did not like our hot summers. The car aged very badly.
This has been the most expensive and worst car I have ever had. It is slow and does not handle well at all. I will never buy and Audi again.
Seriously man, you know that mechanics don't work for free and you (should) know that nothing lasts forever. Seeing as how old cars are closer to "forever" than new cars you have to expect that things will go wrong. The problems you mention are fairly normal for ANY old (er) car and, for example, with a spare hour or two any home mechanic can replace wheel bearings in his driveway for much less than $100. It may be a wise future move for you to either buy a new car or buy a manual.