Read a lot that very easy and cheap to rent a car in Langkawi. My questions are:

1) How's the condition of the cars for rental?
2) Rental is paid upfront or paid when returning?
3) There's probably a few sets of keys for a car, how safe for us to park the car in town or hotel when staying overnight?
4) Is it better to rent from company than individual?
5) How do we actually return the car, cos I don't want to end up being accused of stealing a car?

Sorry for the noob questions but hope somebody can help give me answers. My trip is the coming school holidays.

Thanks stimix and Dark Kai. At least now if I'm told to leave the key in the car, then I'm not shocked or nervous.

But then if I pay a deposit, then definitely I need to return the car properly and get back my deposit, right?