All cases are dependent on the facts surrounding them. You should discuss your case with a criminal defense lawyer in Wake County. No one will be able to tell you that the charge can be reduced without investigating your defenses and discussing the case with the District Attorney.
Assuming the new crime qualifies and that you were not previously placed on probation, you should be eligible for a deferred prosecution. You may not be eligible for an expungement this time, though. Read the certifications you make by signing the agreement at this link.
Yes, they have the right to sue you. Normally they will just turn over an amount like that to a collection agency. They cannot place a lien on your car, but they could obtain a judgment against you and then have the sheriff execute on the judgment, which could include seizing your property for sale to satisfy the judgment and costs. This is not likely. It would be better for you to start making small, good faith payments until your situation improves.
You need to find out the underlying reason for the revocation. Usually it is because a person missed a court date. An attorney can look at your record and advise you on how to clear it up and take care of the DLWR.
It appears you were probably revoked for 4 years for the two DWI's. If that is the case, then you are eligible for a hearing at DMV for conditional restoration after two years of the suspension has passed. At that hearing, it will be your burden to prove that you have not driven during the suspension, AND that you no longer drink ANY alcohol. You will have to have three witnesses testify on your behalf. Contact the DMV and ask about the consultation for conditional restoration. They can explain...
In order to violate the red light statute, you have to enter the INTERSECTION while the light is emitting a steady red signal. The intersection is defined as the area encompassed by the elongation of the lateral curb lines. The stop bar, or limit line as you called it, does not necessarily define the intersection. You should hire an attorney to help you if you intend to make this argument.