Would a ten year old misdemeanor DUI warrant still be active, what might be the punishment to turn myself in and get it taken care of?

Warrants on DUI cases expire after three years, but can be renewed again and again if the prosecutor wants to do so. The first step is to finds out if the warrant it is still active. If it is, it is best to set a motion to quash the warrant, and try to stay out of jail that way. The status of the case at the time the court date was missed and the warrant issued (i.e. prior to trial, vs. probation violation) will largely influence what happens when you go to court. It is best to get an attorney to work through this with you.

Probably, warrants expire after a period of time, but the prosecutor can and frequently does ask that they be renewed/reissued. You can get that information by alling the court where the case originated or contacting an attorney. I would recommend speaking to an attorney and getting information prior to turning yourself in on the warrant. You may be able to avoid going to jail.