I have a car that I am still paying can I still trade in my car and my credit is not good will I still have a problem trading in my car

No that shouldn't be a problem

SO DO THEY TAKE THE TRADE IN AND PAY WHAT I OWE I CAN GET A CAR. OR WHAT THEY DO NOT PAY GOES ON TO THE NEW VEHICLE?

I don't know but I am sure that one of their salespeople can help. They go above and beyond to help with financing.

No but what they don't pay off will be put on the other vehicle

Im not really sure it depends on how your car is