First of all, no I did not hit anyone yet

Just in case I get into that situation (whether my fault or not), what would be the best thing to do.

Questions:
Should I take the person to the nearest hospital or is it advisable to call ambulance instead?
Can I move my vehicle from the scene and if so how would the MMDA/investigator know whose fault is it later?
Can I just go to any hospital and who is going to pay for it?

Thanks in advance.