4chan.org the rapidshares section.
I would use frostwire or limewire, I mainly use limewire to download music.
Lime wire
iTunes.
Qtrax
itunes
1. beemp3
Frostwire
clubcreate.com
itunes
Not if it is purchased or if it is provided by a licensed site. Programs like iTunes allow you to pay for downloading your music... that is legal.
Downloading music for personal use should not be illegal, but it usually depends where you downloaded from or what site
Pandora is a good site