Theoretically you require an International Drivers licence to rent a car in the Canary islands. However, in practice you can make a rental with a standard valid driving license.
You will find most of the International car rental companies on the island and many Spanish companies. Generally, you will always get a better price if you book in advance and internet bookings are probably the most competitively priced. Rentals prices on the Canary Island's are considerably lower than on the mainland.
Regardless of which company you use, make sure you understand what is included in the price you pay and what your liabilities are. Minimum age to rent a car is 21.
In Lanzarote we drive on the right hand side of the road and steering wheels are fitted on the left side of the car. Seat belts must be worn at all times and the blood alcohol limit is 0.08%. Breath tests are carried out randomly and non residents are subject to 'on the spot fines' of up to 600 euros.
Motorcyclists must wear crash helmets.