I agree with Mr. Dorsten. Many states follow the "Driver License Compact," which means that those states would also suspend your license based on the Virginia DUI. For more information see the link below:
Although your son was placed on probation, because he is in drug court there are periodic "judicial review" hearings. The purpose of these hearings is to check the status of treatment and other conditions of probation.
Yes, you can "date." Furthermore, should your conduct eventually progress beyond kissing, because your boyfriend is 16 and you are under 24, you cannot be convicted of sexual activity with a minor. And because he is 16, you cannot be convicted of lewd and lascivious molestation.
As Mr. Dorsten stated, Robbery with a Weapon is a very serious charge that carries a mandatory prison sentence. That being said, based on his mental health and substance abuse issues, the judge could give him a lighter sentence.
If you cannot afford an attorney, I suggest that your husband do the following:
1) contact the judge's office who issued the warrant
2) have the case number ready to give to the judge's assistant and/or name and date of birth
3) very briefly explain that there is an outstanding warrant and that you would like to get it taken care of (essentially, in legal speak, you are asking for a "Motion to Withdraw Capias").
Once he is in court he will ask the judge to withdraw the warrant and remove...
You're typically better off staying in traffic court unless the case needs to be set for jury trial, in which case your attorney would need to transfer it out to the complex on 49th Street. You should consult an attorney before your pretrial next week to avoid the risk of your case being transferred out.
I am assuming both of those were misdemeanor offenses so chances are he is no longer on probation. You could check the Clerk of Court's website in the county where the offenses were charged to see if you can look up the record there.
Regarding the harassment and threats, you could file a petition for injunction against repeat violence or domestic violence (depending on your relationship to the individual). Know however, repeat violence is very difficult to prove.