answered question
Fight for your life, if a person is trying to kidnap you it is not to buy you an ice cream cone.  If anyone puts there hands on you or comes after you in a threatening way you should resist and fight back.
answered
In most places it is illegal to train your dog to attack.  If your dog does attack someone, even if you intentionally do it can be a felony. In other words, you can be charged with maiming.  Pits have bad reps already, why would you want it to attack?