Yes.
Yes. Any valid state issue I.D. is valid for enter and exti Puerto Rico.
As Puerto Rico is a US possession, the laws valid and applicable everywhere in the US would apply in Puerto Rico as well.
Yes, seeing as Puerto Rico is part of the US
Yes, you can drive in Puerto Rico with a valid US driver's license.
No, you cannot fly to Puerto Rico with just a driver's license. You will need a valid passport to travel to Puerto Rico.
No, you cannot travel to Puerto Rico with just your ID. You will need a valid passport to travel to Puerto Rico from the United States.
No, you cannot fly to Puerto Rico with just a driver's license. You will need a valid passport to travel to Puerto Rico.
Yes. All US drivers licenses are valid in all US states, and Puerto Rico is part of the US
If he has a valid passport, yes.
No, you cannot travel to Puerto Rico with just your driver's license. You will need a valid passport to enter Puerto Rico as it is a territory of the United States.
Yes you do.
No. Puerto Rico is part of the US territory, and as such, Mexican nationals require a valid passport and visa.