No, you should not give your rabbit bread, unless it is a very small bit as a treat only once in a while. If your rabbit is an adult, get it some timothy rabbit pellets and some timothy or orchard grass hay. Hay should make up about 80% of a rabbits diet. Adult rabbits need a very small amount of pellets each day, some don't even need it every day. Young rabbits can be fed an alfalfa pellet until they are about 6 months old. Some leafy greens each day are good for them as well. Stay away from sugary things like fruit or too much carrots and no ice berg lettuce. A good mix of greens for rabbits is what they call "spring mix" salad greens.
Hopefully you also have a much larger cage for your rabbit then the one shown in the picture.