No, they are required to execute the will as written.
The executor cannot change the will. They have to execute the will as it was written and as modified by law.
If the executor is in process of selling the car for the estate, I believe it would be proper for them to do that. The executor does not own it but it is their position to disperse the assets.
The executor has the duty to preserve the estate. That can mean preventing others from having access and taking things.
Not specifically. The executor has to settle the estate and report to the court on a quarterly basis with a full report. In some cases it can be done in less then a year, on others, depending on the terms of the will, it can take decades.
As long as your question is referring to the executor of a will, than the answer to your question is yes.
An executor's powers are limited to that mentioned in the will. If it is impossible to carry out the will, then probate court permission will be required.
It depends on the laws of the particular state where the will is being executed concerning the executor.
Yes.
You select a person that you trust. Often people will make their spouse or sibling an executor. Others prefer to leave it in the hands of a bank or lawyer.
Yes, the executor is responsible to the court to preserve the estate. Securing the property by preventing others from accessing the property is a step in that direction.
The court will not usually appoint someone to be an executor if they are incarcerated. The court can appoint anyone as the executor and will often appoint a bank or lawyer to take care of the estate.
An heir may decline to accept an inheritance. The executor then has to distribute the assets per the will.