You would have to start out as just a regular cop and get the experience. Once you have done this you can apply through your job for higher training.
FBI agent careers generally require a college degree in fields like Criminal Justice. You can read about training required at http://www.fbijobs.gov/11.asp
No you can not become an FBI agent when you have gone to a juvenile facility.
they would become an FBI agent because of there income or probably they would just like to protect their community
In order too be considered for the FBI you must be between 23-37 with a 4 year degree from an accredited university. You also need at least 3 years of professional experince.
Absolutely, provided you have become a US citizen and meet all other criteria.
YES
No.
Be very inteligent
No FBI Director has ever become the US President, nor has any FBI Special Agent become the US President. President Nixon applied to become a Special Agent but was not accepted for this position.
All FBI agents are required to be US Citizens.
That is not a requirement.
Did you know that the FBI has a whole section on their website dedicated on information on FBI Agent training? The training lasts 20 weeks which includes 850 hours of instruction, which includes academics, case exercising, firearms training, and operational skills. It's not easy.