Flashy's "bonding with your bunny" article that elrohwen linked is fabulous. There is also a popularly cited article which you can find online called "Winning over a shy rabbit" which contains some good information if you have difficulty getting your bunny to interact with you.
In response to your question, definitely try to bring some of his existing food with you so that you (A) know what he's been eating and can continue to feed it if the food is healthy for the bun and (B) have some of it to gradually wean him off if you feel like you want to change his diet for any reason. It can be stressful for a bunny to suddenly change 100% of everything he eats and cause an upset, or it's possible he might refuse to eat something you offer him if he is unfamiliar with it.
I'm not sure if the breeder went over bunny housing basics, but some things we always tell first-time adopters at our rescue are flooring, hidey box, and litterbox/hay box. There should be proper flooring in their living space. If you have a slippery floor (linoleum or hardwood flooring), you might consider getting a a cheap all-cotton rug from a store to lay in there so the bunny has something he can comfortably gain traction on. Bunnies don't usually like to walk on hardwood floor because they simply slip around on their furry paws. Long-term slippy slidey movements can cause splayed legs
If you plan to give the bunny run of the house, but he seems hesitant to go anywhere, check out whether it's because of lack of floor traction
If you can find any old cardboard box that is big enough for your bunny to sit in, use it! Cut 2 holes in it big enough for bunny to hop in and out and it will be a very comforting spot for him to sit and sleep in. Bunnies in the wild burrow in the ground to sleep/hang outand feel safe from predators. House rabbits need a dark place to do the same. When my buns are in their "hiding place", I don't bother them because that's when I know they don't want to be bothered. Some people make the mistake of giving bunny a "hiding place" and then they go and lift the box up, poke and prod at the bunny, and the bunny freaks out and gets scared of their human because of it.
Get a big (as big as you can find) cat litter box, throw a half-inch thick pile of newspapers in there and then toss your bunny's hay in there. He'll eat there and learn to his business there too! Some bunnies will even use their litter box as their happy place and take a nap there. It's quite a sight to see!