[koriroxx]

I'm pretty sure "to dye hair" is 髪を染める (kami o someru). I'm guessing you could say things like:
明日、髪を黒くに染めるつもりだ。- Tomorrow, I plan on dying my hair black.

Stumped as to what "to brush hair" is... I couldn't find an example anywhere. I would bet on 梳く / 梳かす.