First of all... WELCOME to BHQ. The home of some of the brightest minds and deepest BS in the world.
I know this own't help much right now but the first thing you need to do is get a Clymer manual for your Banshee.
Second, there is no real secret to getting the axle nuts off other than the ones you tried. You could very carefully grind a notch in the outer lock nut not quite down to the threads and get a chisel in there. Of course the nut will be ruined but it will come off. One of the problems with using a pipe wrench is that it gets most of it's grip by squeezing so one something that's rusted on and probably got loctight on it, the pipe wrech may actually make it harder to come off.
I've never dug into a clutch so someone else will have to step in there.