The best way to begin the process of starting a group is to contact the Office for Campus Life (OCL) and the TCU Judiciary. You can find the OCL in the Campus Center. You can also contact the Judiciary by emailing them at t...@tufts.edu.
The Judiciary has put together a guide to starting a group, which can be found here. Once you have gone through the TCU Recognition process with the Judiciary, you will be eligible for funding and should contact the Senate for more information about the budgeting process.