How much is a namechange!

You can find everything here

If you are changing your name for the first time, It's 100k.

Send 100,000 TC to any administrator (Creati0n, Fear, Icky, Rai, Reta) with the name you want. Every time you get a name change the price doubles, so if you were to get a second name change it would cost 200,000, then your third 400,000 and so on. You could also pay a flat rate of $25.

You can get more information here
http://forum.toribash.com/showthread.php?t=343024
http://forum.toribash.com/showthread.php?t=572696