If you're worried about unwanted scratching you need to do two things:
1. Provide a few scratching-approved sites like carpet-covered kitty condos, scratching posts, and possibly a few of the cardboard thingies with catnip in them. Scent them nicely with catnip (just rub a bit on, it'll make kitty want to sharpen her claws!) When kitty first goes exploring the house, tap the approved sites a few times to draw her attention to it, she should start using them.
2. Purchase a can of bitter-apple spray (sorry I can't tell you the brand we use, as I am being held hostage by Randy, who is making biscuits on my knee). Spray the sides and backs of furniture you want claws kept away from. We only spray the sides and backs because we like some kitty-cuddles when we watch TV, and we want them to feel comfortable jumping on the couch, just not sharpening claws on the couch. You will smell the bitter apple for probably 3-5 minutes, and then you won't notice it. It will stick with kitty though and they won't like the smell enough to get it on their paws or claws. We've only had to re-apply once in 3 weeks, and they haven't done any furniture scratching.
This saves your furniture and saves poor kitties claws. (de-clawing is really MUCH more disturbing than you think it is, check the link posted earlier)