Where can I buy purple hair dye? And how much is it?

Well, the only purple hair dyes they have out there are semi-permanent at best... I recommend Manic Panic because it lasts the longest and comes out the brightest. You can get it at beauty supply stores and places in the mall like Hot Topic. It costs $5 to $10 a jar and you need 2 or 3 jars to do a whole head... So you'll need between $15 and $30. Babysitting is a good job to raise alot of money. There's really not many options when you are 13. You can shovel snow out of people's driveways, or do yard work if you live somewhere warm. Good luck to you!