Open your driver's door and there will be a white sticker in there with a barcode, VIN and other information on it. On the lower left of that sticker you will see a line that says "EXT PNT" or something like that. There will be a two digit code for your color. That's your paint code.
Ford color codes are typically a letter, followed by a number, or it's simply two letters. My car was WJ, but others can be E9, UA, UJ etc.
I paint lots, and I work in the industry. I will tell you right now that it's not likely going to be able to get done with decent materials for less than $150. A cheap gallon of clear is usually $100 for a kit, cheap (read crappy) primer is like $50 a gallon, and color varies but $75+ for a gallon of the cheap stuff comes to mind. (Good basecoat can be several hundred dollars a gallon).
I painted my car at work, and a friend's car at work too. However, I'm lucky in that I haven't had to pay for paint in 6 years. The material on my car would have been over $1,000 otherwise.