To rent a car from a rental company in Australia, you typically need a valid driver's license, either from Australia or an International Driving Permit if you're an international visitor. Most companies require drivers to be at least 21 years old, with additional fees or restrictions for younger or older drivers. A credit card in the driver's name is usually required for payment and to cover any security deposit. It's advisable to bring along your booking confirmation, proof of insurance coverage if not purchasing rental insurance, and any additional identification required by the rental company. Policies on additional drivers, fueling requirements, and handling of roadside assistance or breakdowns should also be clarified beforehand to ensure a smooth rental experience.