My cats have never torn up my furniture, either. My son's cats have torn up their furniture. I don't really get why. I know I pay attention to my cats when I think they're about to do it and I hiss at them. There's something about multitasking that my sons are not able to do! (Pay attention to what they're doing AND notice the cat is stretching up to scratch the furniture.)
I don't clip nails or anything like that. My cats do go outside.
I use the regular Tidy Cat litter, and one tip is to make it as simple and convenient as possible to scoop the litter. (My cats only use it when it's wet outside.) I keep the litter box in the upstairs bathroom, and I have a small trash can with a step-lid beside it. I scoop into that trash can when I scoop and then pull the bag out of the can when necessary.
I also use a large Rubbermaid tub for litter, not a short-sided pan. This cuts way way down on the amount of litter that comes out on their feet. I originally started using this because I had a small dog that probably would have gotten in the litter. I turned the tub upside down on its lid, and cut a cat-sized hole in the side, and put a litter pan inside. Kept the dog out. But now the dogs are different, bigger and not interested, so I just use the tub right side up with no lid. The cats seem to like it just fine, but they prefer to go outside. They have litter boxes on the market now that do the same thing, but the tub works just fine and is less expensive. If you get a kitten, you will have to provide a way for the kitty to get in the litter box on its own if you go this route. Or start with a short one.
There's a cat out there who needs your home! Go for it! 
Karen
~~~~~~~~~~~~~~~~~~~~~~~~~~
insidious ungovernable cardboard