Yes, there are, but there are very few. In some cities, there are some models and in others, the only option is to rent manual cars.

Yes, it is possible, but the distances are very long. The best is to fly to each destination and take the car you will use on those days at the airport. This way you will enjoy it more and it will be less exhausting.

The North of Argentina (Salta and Jujuy), Bariloche and the lake area in Chile (Puerto Varas) and the area of El Calafate.

No, there are places where it is best to go with a full tank or even go with backup in the trunk, for example in Patagonia, where there are long deserted routes without fuel stations.

To have internet you must buy a sim card from Argentina and charge it with money. However, there are some routes where you still won't have good reception. The best thing is to have all the information you will need downloaded and analyzed the route and the stops you would like to make.