Download Cool Edit Pro And The Crack From Kazaa
That take care of recording,mixing,editing and mastering vocals

You'll also need beats...you could download them from kazaa but theyre either un-original or virus contained plus this RIAA shit dont make it that safe

My Beats
http://www.soundclick.com/doubleitupproductions

Theyre free to use so if u like somethin u hear email me to use it

Cool Edit 2.0
Mic
Beats

Thats enough to get started and as you progress you'll probably upgrade equiptment