Like most of the world's major cities, Wellington Transport is well-thought out, economical and efficient. Buses, trains, taxis, even ferries, you'll never be standing still. There's even a cable car, for transport with a difference.
Transport in Wellington is surprisingly good, considering the city is very compact, and most things are usually walkable, anyway. Taxis are plentiful, operated by several private companies (there's no single, city-run operator) - but always check estimated fares before setting off. Buses enjoy a comprehensive, efficient network, with most going wither northbound or southbound. You'll never wait more than a few minutes for one, and most will drop off at the major attractions. There are ferries taking you across to Petone, Eastbourne and Somes Island. Trains are the best option if you want to go further, to Porirua, the Hutt Valley, and the Kapiti Coast. The Kelburn cable car is a must, an icon of the city running between the Botanic Gardens (Kelburn) and Lambton Quay. Expect to queue in high season. Car and campervan rental is also popular. Wellington is a drive-friendly city, with plenty of parking, and easy access in and out. If you're flying in, the airport has vehicle rental desks in the Arrivals Hall.