You can file a motion to hold the person in contempt of court.

Yes, the trier of fact, judge or jury, could make that determination.

You simply point out there is no evidence of their claims.

Contact the jury commissioner to let them know the issue and to reschedule your service.

If a defendant did not answer the complaint, and they were served, the court can enter a default judgment on the allegations of Plaintiff.

You can use as many of the arguments from other briefs as apply to the other defendants' motions.

More details are needed as an answer to a complaint does not generally require a response.

If you were served outside the State of the Court you may have no obligation to appear. Consult with an experienced attorney.

You would have to find an exception to the statute of limitations, and fraud might apply. See an experienced attorney in your state.

Some states it can take a long time, but this may be excessive. Get a report from your attorney of status by asking, in writing, for a status update.