Taxis between town and the airport (5km north of town) should cost around Ar25,000. Taxi rides within town are Ar3000.
Some local minibuses shuttle passengers around town for Ar300, if you can work out the routes; service No 4 goes to the Bazary Kely and the port.
To hire a car locally, inquire at any hotel, restaurant or travel agency, or ask around at the taxi-brousse station. It may be more expensive if you want to take the vehicle beyond Foulpointe.
Pousse-pousse drivers charge from Ar1000 per trip within the town centre. The drivers are fairly friendly, but agree on the fee before you climb in. Tuk-tuks are the same price and a much safer option at night.