Welcome and congratulations on your new bunnies!
You want to make sure to feed the same kind of pellets that they were getting before. This is to minimize any digestive problems. It's not good to suddenly switch a rabbits food. If you want to change their pellets to something different than what they were getting before, then you gradually transition from their old food to the new food over about 2 weeks. Starting with adding a little of the new food to the old food and gradually increasing the amount until at the end of two weeks you are only feeding the new food. You want to give a plain alfalfa based pellet until 6 mo. old, then some people will switch their rabbits to a timothy based pellet. Some people will feed alfalfa hay to bunnies, and some will feed timothy or another grass hay. Or you can do both, that's what I do for my bunnies. It's recommended to feed unlimited pellets and hay to bunnies until 6 mo. old. I've had to limit pellets with some of my bunnies because they were getting poopy bums with unlimited pellets. After 6 mo. you limit pellets based on body weight and the rabbits individual metabolism, but you will still feed unlimited hay, but only a grass hay. You'll want to wait until at least 12 weeks old before you start introducing veggies and fruits, and then fruits should only be done on a very limited basis and only if your rabbit doesn't have any digestive problems. Here are some good veggie lists for when the time comes.
http://www.rabbit.org/care/veggies.html
http://www.3bunnies.org/feeding.htm#greens
You'll want to keep an eye out these first few days of having your bunnies, and make sure that they are having normal poops and don't stop eating at all. Sometimes being in a new place can be stressful for rabbits, but it's good that you have two to keep each other company. That should help.
Around 2-3 months, if your boy rabbit starts humping the female at all, you will need to start housing them separately to prevent the female from getting pregnant, which can be fatal at that young age. After that they will need to be kept separate unless you plan on spaying/neutering, and that can usually be done sometimes as early as 4 mo. old. Also, when the bunnies are a little older, you may want to double check on their sexes just to be sure.
If you let them run around your house, make sure you supervise and do some rabbit proofing. Rabbits are chewers and seem to be especially drawn to power cords.
Cardboard toilet paper rolls make good toys, apple wood and willow are good for chewing on, cardboard boxes with holes cut in are good hidey holes. Hard dried pine cones are a good chew toy. Wiffle balls, grass mats, Hard plastic baby keys, can all be fun toys. Whatever you use, your bunnies will chew on, so make sure it is rabbit safe.
Also make sure to use a rabbit safe litter if you have litter in their cage.
Good luck with your new buns and feel free to post pictures. Would love to see your babies
