Yes. You need to have the proper business licenses according to the state you live in so that you can own and operate a modeling and talent agency.
Yes, a model is considered a "performing artist" and the laws governing talent agencies in Florida revolve around protecting "performing artists".
You do need a general business license in order to open a modeling agency, regardless of what type of models you tend to represent. The nature of your business as a modeling agency will come into play when you fill out the appropriate forms. Below is a link to a form for an application for an employment agency license in New York:http://www.labor.state.ny.us/workerprotection/laborstandards/pdfs/ls355.pdf
Yes. In order to run any legitimate business that is for profit, you must have a business license.
talent
Yes. Each state has its own requirements so you can check out this URL to a site called the Association of Talent Agents: http://www.agentassociation.com/frontdoor/agency_licensing.cfm
no you just need to have actual talent
Yes. Because each state requires different kinds of licenses and other documentation, it is best to visit the official government website for Texas and look for content related to opening a business.
The best way is to find legit and reputable agencies local to you (within a 2 hour's drive). If you want to be an actor then you will need to search for talent agencies and if you want to be a model then you will need to search for a modeling agency. If you want to do both, then find a talent agency...they often represent both models and actors. Many times the name will have "Model & Talent" in it but even if it says it is just a Talent Agency, they more than likely represent models as well. Visit their websites, which will give you all the information you'll need to know, including what kind of pictures to send, FAQs, and if they hold open casting calls (certain days and time when you can go in and interview with the agency without the need for an appointment).
You need to contact a talent agency in your area.
No
This will depend on what state you live in. Each state has its own requirements. Check out this link, which offers information on license requirements for talent agencies arranged by state: http://www.agentassociation.com/frontdoor/agency_licensing_detail.cfm?id=571
No. You need special training and a professional license to be an orthodontist.