Answer:
The fastest and easiest way to get around in Paris is to use public transportation, especially the subway system called here 'le métro'. Some faster lines, but with far fewer stops, belong to the RER regional train system and also run through Paris.
The public buses use the same tickets or pass. The bike-renting scheme is also popular and efficient.
Personal cars are still favoured by large numbers of people, but the traffic is slow and parking is not always easy to find.