House rabbits enjoy rabbit food pellets and Timothy Hay treats in the house. Most rabbits can't have carrots! I would not suggest you buy your rabbit from a pet store, they are healthier if you get them from a breeder.
No, it's not healthy for rabbits to eat wisteria plants: wisteria is dangerous for rabbits! Wisteria is identified as a poisonous plant by the House Rabbit Society. Keep wisteria away from rabbits. See the related link and questions below for more help.
No rabbits eat their feces, although all rabbits eat cecotropes. Rabbits have two kinds of droppings: feces, and cecotropes. Baby rabbits that aren't weaned yet eat their mother's cecotropes; once they're weaned, they eat their own cecotropes.