would have made sense to put it here mate:
http://www.toyotagtturbo.com/forumdisplay.php?f=11
dont know how to adjust the cables.
rear pads:
1. jack up safely/wheel off/in gear without handbrake on
2. two 14mm (im sure) bolts hold on the caliper, remove caliper (can be stiff) and take the pads out
3. put in new pads
4. you may have to wind caliper to get caliper back on over the disc
5. tighten up two 14mm bolts
6. wheel back on.
7. to be safe bleed your brakes
Craig