Forget it, sounds like you need a new bike!
Seriously tho. Brakes: I either use a flat screw driver pushing on back of pads (not the pistons) or if the pads are out I slide a flat object (park tool chain checker) and push the pistons back, doing it this way means the pistons won’t twist and get wedged. You can buy a specific tool (park do one) to push pistons back, but I don’t have it.
Spokes: sounds like a bad wheel build, get the whole wheel checked rather than spending £10 per spoke! You can tighten spikes yourself tho, just need a spoke key.