When it comes to your comfort and flexibility, there is no better option than to rent a vehicle when you are travelling abroad. Drivers’ licences have become universal and few countries require a special permit. GPS systems are also universal, so you can find your way in different countries no matter what system is built-in or included in your rental. If you are concerned about road rules, the UK or Australia might present a bit of a challenge since everything is upside down (!) but in a day or two you will be able to get acquainted with the local infrastructure. Otherwise, road signalling, rules and signs are more or less the same anywhere you go.
Renting a vehicle has never been easier. You can make a reservation much in advance of your trip and have a plethora of options to choose from. Book your transfer online and ensure that the vehicle of your choice will be at your disposal once you reach your destination. If you book in advance, the car rental company is likely to give you an upgrade if there is a car available, giving you a better value for what you have paid for.
You will be asked to sign a contract. Most car rental contracts more or less state the same things, so once you have seen one you have seen most of them. It is unlikely that you will find some unreasonable claim in a contract or something that you might not expect.
You can pick up your car directly from the airport and even drop it off at another location if your travel itinerary requires it. Make these plans in advance so that you make the most out of your car rental experience.
Since car rental companies own large fleets and many of them have a global reach, renting a car might cost as low as 25-30 Euros per day including basic insurance. Public transportation might surpass this amount considerably if you choose to move around by bus, tram, metro. Taxi should be more expensive altogether.