what is the difrence of a sofa sleepers and futons???

if there is a difrence???
and are the comfy?
what are the good and bads for each of them???

thanks

Sofa sleepers generally look like a regular living room sofa. A futon is built differently, usually absent padded arm rests and padded cushions and having one large mattress that sits on a wood or metal frame which makes down into a bed or can have one side raised up to make a bench.

http://en.wikipedia.org/wiki/Futon

Should I buy a kitten in a house with carpets and good sofas?

I'm 13 and I've always wanted a cat and now since we live in a nice big house, I think I can get one. the only problem is the 'nice'. There is a carpet covering on the second floor and our sofas are a very light color and my mom doesnt want me getting stains on them. Any suggestions? And do cats come already litter trained?

LOL wow you're a newbie for it eh?
Anyway. Your best bet for an animal in a "nice" as you put it house, would be to get an OLDER cat instead of a kitten. Most of the time when you get a cat from a shelter or something like that (and I do recommend adopting - if you adopt a cat, you're really helping TWO, because you give one a home, which makes room at the shelter/foster home for another one) it will be litter trained already. If it's not, I'm sure you can ask whoever you get the cat from about it.
As far as scratching and stains go - cats are generally clean creatures, and would prefer to "go" in the litter box if possible. Just as long as you keep it clean and easily accessible, and kitty knows where to find it for sure, you wouldn't have a problem with "stains". As far as fur goes, brushing will go a long way towards helping to keep shedding under control, and you'll have to vacuum more often.
Now I'm assuming a big worry is the claws. You have a few options here.
1-get an already declawed cat
2-get a catnip-infused scratching post (it will attract kitty to it and so kitty should leave your furniture alone)
3-softclaws claw caps (that's a brand name…it's basically like "fake nails" for humans except for a cats claws) - comfortable for them, easy to put on, and fairly inexpensive. A vet or groomer can show you how to put them on initially, then you could even do it yourself after that. They even come in cool colors www.softclaws.com for more information on that.
4-Keeping kitty's claws clipped. That way, they're duller, so they can't do any damage - and they won't hurt (I know it sounds like it wouldn't work - after all, how could clipping them make them less painful for you and your furniture?) I was doubtful to but we clipped our cat's claws and it makes a WORLD of difference!
I HIGHLY recommend not declawing a cat yourself. It is very painful for the cat, and very painful for your finances (it costs a LOT between the procedure, the medicine, etc.) The older they are, the more painful it is for them as well.
Good luck with your new kitty!