If you want your hair lightening, I cannot stress how easy it is for your hair to go absolutely horribly wrong! Please please pleeeeease try your best to get it done professionally in a salon - it could actually save you money - the cost of trying to salvage your hair if it goes wrong is far worse!
If you insist on doing it yourself, follow the instructions exactly, and time the application of the cream down to the last minute! If you don't leave it on long enough, it will go orange, and if you leave it on too long your hair will fall out. You've been warned
Also, do not use it if you have ever dyed your hair, and the dye is still there.
Oh and for dyes, I recommend a brand called 'Smart Colour.' They are good and they do the job well.