Is your question "How do I start a sanctioned TLCA Chapter club," or "how do I start a local club with some of my buddies?"
The short answer to the second question is...just do it! Get together with you group of friends that I assume you alredy do stuff with once and a while, and pitch the idea. Get together once a month at your favorite restaurant, and put together a prgram, and set some goals that everyone can get behind. Make them easily achievable at first. Stuff like :lets go camping that place we all like to go and take our 4x4's," or "let's go run that trail we all like next month," or "let's talk about adopting a trail to clean up, and tell newspapers and radio and tv affiliates when we'll be there doing it. Have group maintanance weekends, go on float trips, have club bbq's-whatever y'all like!
After doing this for a year or so, getting your proven core of 5-10 guys and galls, at least 5 of whom are tlca members, then you can start thinking about becoming a tlca chapter. That's really just a matter of filling out some paperwork, which I'll be glad to help you thru.
Any other q's?