The brakes on a 99 4runner are a peice of cake. Pull off the wheel, remove the caliper (leave hose connected) and pull off rotor and slide new rotor on. I removed the pads before bolting the caliper back on and installed new pads with the caliper in place.
I used a towel (to not mark up rotor) and large (Big Mother) screw driver to open caliper pistons enough to install new pads. If the caliper is seized, it wont work.
Ken Romer - K0ROM
16 Kimberley Karavan