You have a TJ not a YJ. TJ's front head lights are rounds and YJ's front head lights are square. YJ's last year was 1995.
The clank sounds like a U Joint or your suspension bottoming out.
Good luck on finding the doors. They are highy sought after, but check local junkyards, craigslist.com, ebay, etc.
You can take the wheels off and sand them best you can and then do just about anything to them, like rattle can paint, powder coat, etc. New wheels can be found from anywhere from $50-$200. If you plan on getting bigger tires then the stock ones won't do you much good anyway.
Have somebody knowledgeable look at your a/c. It might have a leak or just need some refrigerant added.