ahkiat: i disagree ..
starting off with a bass with a huge tonal palatte may cause confusion on the part of the learner. All beginners require is to learn how to play the bass, not learn how the bass sounds like.
besides, a new guy can't exactly tell the difference in terms of .. "oh, that's a P-bass sound, that's a J-bass sound, that sounds like musicman" ... i believe over time taste will develop. All the beginner needs now is to learn the foundation of bass playing and not bother too much about tone for the beginning period.