in the long run...it's not worth it. too expensive to keep up.
It depends on your hair color. This is just my opinion, if you have black hair or red hair, I don't know what color. If you have brown hair you should get blond highlights and if you have blond hair you should get brown highlights.
Blue or Blond
blonde
about a month
There are many choices of colors for highlights for blonde hair. If you would like to brighten up your complexion, you can opt for platinum blonde or light golden blonde highlights. You can also warm up the hair with light red highlights.
Someone can get highlights in their hair as young as 6 or 7 I think. I mean medically, its not that unhealthy. But if you care about whether or not they should be dying their hair at this age it's your call.
Well if you mean literally dirty hair, then you should wash it and then get highlights for best results. But if you mean hair that has mixed colors and bleached spots, you should wait till the dye is out or bleach it out for best results:)
red or gold
You shouldn't do both at the same time. If you put a permanent relaxer in your hair, you should wait at least 2 weeks to put highlights in your hair. If you have highlights in your hair before you put the perm in, you should wait several weeks while you put a deep conditioner in your hair.
A guy should were blonde spiky hair and a CP jacket
puberty
Highlights are sections of your hair that are dyed to be lighter than the rest of your hair.