Can't see much from the pictures, but I always liked the blue ones...
Has anything been done to it yet? How many miles?
More pics maybe......
Some basics to me would be to get everything updated first (fluids, brakes, etc)
Then throw on a front/rear strut bar , and a nice set of wheels, tires......
http://www.autorentalandsales.com/images/2004Cavalier005.JPG