1 st. Red is the hardest color to get rid of.
2 nd. Definitly go see a professionnel cause if you do it wrong your hair can fall out...
3 rd. Yeah it burns! But it wont kill you.
4 th. Make sure it doesnt look like your dog pissed on your head!!!! cause i've seen ppl with that and it looks awful!
And finaly, the cost depends on the lenth of your hair, but its pretty expensive so be sure that you wont regret it!

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Arguing on the internet is like running in the special olympics.
Even if you win, you're still retarded.