Part 2: Setting up your ToriClan page:

If your new clans details are already taken by an unofficial clan, and that clan is considered dead (see 'Activity Checks, Dead Clans & Revival section), contact a member of clan management to have the name freed up.

This is an absolute essential if you want to be able to use any of the functions that having a clan comes with (making ranks, warring, etc). To do this you must have the following:

25,000 toricredits.
5 members.
A thread in Clan Discussion.