Most of the centre of Lille is pedestrianised and well signposted. The historic centre of the city is a delight to walk through so using any other form of transport would be futile. The city does have a good public transport system should it be required, with two metro lines, two tramlines and multiple buses covering most of the city. Taxis are widely available from the airport and the Lille Europe train station, which is centrally located near the main square. Renting a bike is also a good option in summer. The city lends itself to cycling and it is an easy and cheap way to get around. Overall, Lille has a more than adequate transport network and getting around is easy. However, if you do want to rent a car it is not difficult to do so.
