For the first couple of days that you have them at home, you need to keep them in a room with the litter box to 'force' them to use it. Make sure the room does not have carpeting, throw rugs, etc.
If you keep their food and water in the same room as the litterbox, make sure it is far away - otherwise you'll end up with litter in the water and it's a mess.
Check the Purina Cat Chow and American Cat Fancier's sites for information on kitten care. Also
http://www.peteducation.com
Handle the kits a lot - that will make them friendlier. You can also start getting them used to being brushed (daily) to cut down on shedding AND have your vet show you the proper way to trim their front claws. Do not play with them by dangling your fingers or waving them - you'll end up bleeding, trust me, and the kits will attack hands (not a good thing) when they get older. Please do not declaw them! My cats have all their claws and have been trained to used their rope-covered scratching posts - not the furniture. Don't get carpet-covered posts - rope posts and the cardboard scratching platforms (preferably one of each) are best.
Get a couple of good toys - some small balls with bells, a busy wand, etc. for them to play with.
Please don't think I'm being rude - but you really should have read up on this stuff
before you brought the kittens home.