1. Is it stated anywhere in the bible that you cant marry/date a non-JW?
The bible warns against marrying a "non-believer" which to a JW is any non-JW.
2. Does the bible state that you have to go door to door and be at "x" number of meetings?
The bible does say that you should preach and make disciples. Because the early apostles went door to door (this is even debateable) the JWs say we have to do the same.
It says nothing about the number of meetings, only that we shouldn't forsake the gathering of ourselves together, which could mean numerous things, but to JWs it means that you have to go to all the meetings.
3. Why do most JWs not know there history? They told me the first witness was Able not Charles Taze Russell?
Most of them do know their JW history, or at least a white washed version of it. They just believe that they are an extension of true worshippers that originated back with Abel.