Hmm i got a problem, as you can see some of th bodyparts is seeable trough the clothes WHY!?!?!?! How do i cover up those parts that you can see?

There are several ways: 1) Did you conform the clothing to the character? 2) Hide the body parts that pokes through the clothes. Open the hierarchy editor and uncheck the little eye symbol for the body parts concerned. 3) Use magnets to deform the clothes to fit better. 4) Rescale the clothes using the scale dials.