How do i move my music from wmp to itunes?

Without knowing what WPL is, who knows if it can be imported to iTunes. Drag and drop a file from the folder to iTunes. If it can convert it, it will ask if you want it to. Choose Yes. If it doesn't ask, it's because it can't. You'll have to either import it with an iTunes default or find some way to convert everything, which is probably going to come down to it being necessary to find out what that file extension is.