You can always get them declawed at your vet. I know some people are against that, but it saved our furniture.
You can teach them not to claw at stuff. Take an empty soda can, put some pennies in it and then when they scratch shake it at them. Cutting off a cats claws is like cutting off the tops of a persons fingers.
Thanks for all the info! They are very entertaining to watch , but they are into everything. I have one very large litter box right now and they seem to be okay both using it. I will get another when they get bigger though. The claws are the worst thing, they dig them into everything. I'm scared to cut them myself though.