1) No, there is no need to make a police report as there are no
injuries. Even if you did, the police will not borther.
2) You have to first inform the rental company. Next, bring the car
to IDAC (if it is not there yet) for investigation purposes. Bring
your IC, Driving license, car log card (Ask the rental company for
it) or photocopy of it, all insurance papers. Prepare to write down
a story of the whole incident + photos if any.