lisalisa....rabbits need veg. It is good for them and they need to chew on things like carrots to keep their teeth down. I would advise not to give too much lettuce or green stuff though as it can make them poorly with diarrhoea....a little bit is ok though.
Get as good a rabbit food as you can afford.....the all in one pellets are usually a good choice as the rabbits can't just pick out the bits they like from the combined food, and therefore get everything they need.
Lots of straw or hay in the hutch will keep bunny warm as well.
Get a run as soon as you can afford it.
You can buy a small indoor rabbit cage if you would rather have him in one of those inside at night when it is cold. They have plastic bases and are easy to clean and disinfect.
You can litter train rabbits as well!!!
And the best bit....lots of cuddles to get the bunny used to you all!!