Well you need rear brakes. If you didn't they wouldn't put them on at the factory. Drum brakes aren't too bad to work on. You'll need seals, shoes, wheel cylinders, spring kit and brake adjuster kit. You can most likely take your drums to where ever they do brakes and have them turned. They will let you know if there is enough material or if you'll need new drums. Not sure what rear axle you have so I don't know about the seals. Just do one side at a time that way you have a reference when reassembling the brakes.