What upgrades can I do to my Audi 90?

I have a 1994 Audi 90, and I was planning to sell it but decided I want to do some work on it and keep it, but Im honestly not too much of a mechanic and have less experience on Audi cars. I want to upgrade/tune the engine as much as possible and work on the body (rims, bumpers, lighting etc). I DO have a budget and want to work on it little by little but I would REALLY appreciate any suggestions! =]

Mm… I found it at http://obuyo.info/5083/audi-cars

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