You have to win fights ON OFFICIAL SERVERS.

Begginer::XXXXX - From White Belt to Yellow Belt.
Intermediate::XXXXX - From White Belt to Green belt.
Semipro::XXXX - From White belt to Brown Belt.
BlackBelt::XXXX - Black Belt and above.

You win 10tc per fight, the best way to win tc are:
-Art (Making textures).
-Tourneys.
-And boosters/buy tc By paypal of course.