If you don't have experience with a cat, those questions can be very difficult to answer. A cat will scratch. It's not to sharpen his claws, as some think, although one effect is to pull the old sheaths off claws, leaving new, sharp ones. Some cats scratch on lots of things. Some stick to the supplied cat tree, or whatever. You can keep his claws trimmed, which helps some.
If you put the kitten in a small room with a litter box (low-sided, like a cake pan, if the kitten is small), most kittens will use a litter box with no problems. If you are careful to get it spayed or neutered well before puberty (by about 4 months of age), a lot of the later problems can be avoided.