The cage should contain food and water, a litter pan, and a solid surface to sit on. Wire floors can cause problems for bunny feet, even though their feet are covered in fur, the wires can irritate the skin underneath. Food Rabbits should be fed a good quality, but plain, pelleted food. All the fancy stuff is there for you, the owner, not for the bunny. Baby bunnies should be provided with some timothy but also can have alfalfa hay.
Rabbits also enjoy vegetables for treats.
In spite of Bugs, they should not have too much carrot, a small piece every day is fine, but not too big. Dark leaf lettuces, parsley, cilantro and other herbs can be given in small quantities. This gives the rabbit a variety in its diet, and you can share in this by offering it as a hand fed food. Some rabbits love raisins, but they are very high in sugar and so should be treated like candy - a very occasional treat. Litterbox Training Rabbits are very clean animals, just like cats, and can be trained to use a litter box.