I think you meant UV "map". If you're planning to use any textures, yes you do. I don't think it was a good idea to have the entire model be one piece of geometry, like the gum and teeth and stuff. I don't blame you for not wanting to deal with all that, but in all honesty, this isn't the simplest model to learn UV mapping, so if you can manage to separate then it may not be such a hardship.

Dave that link is broken.