Currently driving this in batam....

Thought of owning it...
Questions...
1. Do I need to obtain international driving licences fr AAS to drive batam car.
2. How could a foreigner/Indonesian legally own a vehicle?
3. As this is a used car...
What are the Documents required for proven of ownership.(log book / LTA letter of ownership transfers)
4. What are the Documents required for the car to be on the road.
(Road tax / insurance )
5. Any other's things/documents that I may had missed out
TIA