If you are serious about doing this, shell out the money(Approx. $50) for a Haynes or Gregorys manual and research it. It will tell you how to do it, step by step.
Once a head gasket goes, you really should have the head and block checked for any distortion to prevent it from leaking again.
I would guess at minimum, a few hundred dollars for gaskets(do not re-use the old ones) and coolant, plus any consumables used during the process.
http://www.supercheapauto.com.au/online-store/products/Gregory-s-Car-Manual-Camry-SXV20-MCV20-276.aspx?pid=288359#Cross