Welcome Gem! And welcome to the world of bunnies! Wow, 10 guinea pigs, now that's quite a crew.
Did you know rabbits can actually be litter trained? Maybe soon you can have him as a full time house pet. How os Milo right now in the house?
Regarding wires - You may also be able to purchase wire covers at a local hardware store or online.
Many bunnies know their name and can come when called. They are intelligent creatures - they can even be clicker trained. I went to a clicker training class and the teacher had a bunny that could flop on command. We also went throughout the shelter putting the tools into practice and within minutes were training bunnies. It's pretty amazing.
Regarding him hopping from one sofa and back again: This could have meant a number of things:
First: He might have been mapping out his territory. Slowly going from what was safe - adventure out, back to safety again - Rabbits explore things over and over to solidify a mental map. It's a survival tool
Second: He could have been inviting you to play or even mate. Sometimes bunnies will run circles around their potential mate, and maybe since he couldn't run circles around you he just ran back and forth.
Turning his back to you and cleaning:
Many times a bunny will deliberately turn his back to you if you offended him. But since he was cleaning himself then I'm not exactly for sure. Maybe he was just getting into position. He might be saying I don't see you as a threat, and I'm not a threat. A sort of ignoring behavior which actually means I am open to a friendship. It's really hard to tell for sure unless I know what goes on prior to him turning his back.
Chew Toys: Phone books, boxes, paper bags (which you can fill with hay and treats) are other good options too.