You will need a 12 mm wrench for the caliper but the rotor replacement requires a socket for the axle nut, a sldehammer, and a 12 mm socket and rachet. You must remove the hub since the rotor is bolted to it on the back side. You will see what I mean when you pull the wheel (I assume you know you need a lug wrench too
). If the rotors have good thickness and are not warped, I usually rough up the surface with some 40 grit to clean off the glaze and stick a set of pads on and go. You can usually rent the slide hammer from you auto parts store.