you should only have discs in the front, the rear should be drums which arent replaced as much as regular disc brakes. but, you can take your jeep to any auto shop like aamco or even goodyear, any place that does tune ups and such. they can replace your brakes for you, the brakes will cost around $50, depending on the brand. installation will run about the same. rotors are a different story they are a little more expensive. it will cost you around $120 for a good set of rotors and if installed with the brakes all together the installation will cost you around $100. so cost of brakes, rotors, and install will be around $200-270.