Read this for the paint.
http://www.raydobbins.com/pantografa...er_touchup.htm
Pick your bike up off the ground and prop it up with something under one of the pedals.
And from what it looks like, it is a 700c rear wheel with a 27" front. There are a ton of 700c options out there, just check ebay. Also, drop by the lbs first and make sure that is the size you need.
How much did you spend on this btw?