Taxis cannot be hailed on the streets they won't stop and there are two main taxi stands open around the clock at the Avenue de Monte Carlo and the railway station, although it is always best to agree a fee beforehand or make sure the meter is running. Most hotels will provide taxis or courtesy drivers. The best is to get the taxi service phone number to be able to call a taxi wherever your are.
Walking is by far the best way to get around Monaco; however, there are some areas, such as the Exotic Gardens, that require a large change in elevation and therefore make for rather strenuous hikes. There are also seven public escalators and elevators all free that help negotiate the steep slopes of the city. If you find yourself afoot and wanting to reach the opposite bank of Port Hercule, look for the small pedestrian-only ferry that runs each 20 minutes or so during daylight; it costs only one Euro.
Private cars are singularly useless for getting around Monaco, as you'll spend more time trying to park than if you walked or took a taxi instead.
International car hire companies do have offices at the airport in Nice and also in Monte Carlo city. These include Avis, Gare Monte Carlo, Europcar and Hertz - drivers must have held a national driving license for at least one year and it is usually requested that the cost is paid for with the driver’s credit card. Driving in the city center can be intimidating in Monte Carlo with heavy traffic - however, it is often worth this to drive alongside the more expensive vehicles in the city! Make sure to request a car with an automatic gearbox if you are not used to driving manual.
By Motor Scooter
You can easily rent a motor scooter in Nice and take a short trip east along the sea into Monaco. The views are beautiful and the ride is fun along the twisty seaside road. There are plenty of places to park for free. Theft is not a concern, as there are cameras throughout and police everywhere. To rent one whilst there, you must be 16.
Monaco has an urban bus service, operated by the Compagnie des Autobus Monaco (http://www.cam.mc/), which comprises of five bus routes labeled 1, 2, 4, 5 and 6 serving 143 stops. Each stop has the bus numbers that stop there, and most stops feature a real-time display showing waiting times for the next service. Each stop has a name and a network map. The service usually starts at around 0600 and runs right through until about 2100. Tickets can be purchased on board the buses themselves €2, at many news vendors and shops throughout the city and at auto ticket machines in the stops €1.50 - often it will be advertised as to where you can do this. A daily pass allows you to use the buses all day for €5 7/2012 and can also be purchased onboard the bus. A night bus service operates in a circular route from 22.00 until 04.00.