I don't know the troll brake set up, btut brakes is brakes, they're all basically the same - ie they're all easy. The only real variations with calipers are if sliders you need to remove the caliper to get the pads out or at least one end and swing the caliper away. If twin or more apposing piston style you may be able to pull a couple of pins and remove the pads directly.
Changing discs is similarly simple and similarly 2 possibilities. Both require the complete caliper and any carrier removing. Easiest is the type that just slip over the hub from the outside. there might be a small retaining screw to remove, might need an impact driver on it or drill it out (don't worry if you destroy it they aren't actually needed, they just make re-assembly easier). Clean up the hub face with a wire bush, very light application of copper grease an pop the new one on. Other type require the hub removing so you need to undo the wheel bearing, after that drop the hub off and there will be 6 to 12 nuts/bolts holdingthe disc on remove these and then treatas above. Tchnically you'll need the correct torque for the hub nut but can be set by feel. You need to nip the bearing up till its just tight then back off till theres the tiniest perceptible movement in the bearing (stick the wheel back on to give you more leverage to feel this), then stake t enut or pin the castellation or however its retained.