Only know fronts off top of my head as i've just replaced my front discs and pads yesterday. Front guide pins (allen key bolt 8mm) is 25Nm, and caliper bracket bolts (18mm socket) are 125Nm. Wheel nuts are 120Nm.
Loosen bleed nipple too before removing caliper from bracket, (11mm socket), it's alot harder to do when you have it off. If you wanted take full caliper off and give it a clean up and check piston goes back in smoothly. To do that you'd need a hose clamp and to undo the brake pipe, again this is a 11mm socket. Just make sure everything is clean, especially the mating surfaces of the brake pipe.