Congrats! It's a great feeling when you get something back on the road.

You sound like you have issue 1 right to me. Issue 2 could be a number of things, tailshaft, uni-joint, bent axle, bad gearbox x-member mount.... And issue 3 is no big deal, could just be the kickdown switch needs adjusting and the belt replaced or tightened. The trimatic will be fine if you don't flog it. I'll have it when you've finished with it if you don't want it.......

Have fun and enjoy it!