White is a nice colour as any rust will be obvious if it is original paint. Is it original paint?

Look for rust on the doors at the upper edge of the clading. Also along the bottom of the doors where the weatherstrip fits.

You will need to run premium fuel in the M104 however some will disagree.

Not original wheels. Not sure why one would change from originals as they looked nice and where easy to clean on the '94 unless they went to 16".