Oh man! Good question. The real answer is: It depends on your lifestyle and your wallet. If you will rarely drive out of the city to the countryside, beaches, etc, then you do not need a car and can rent one when you do. However, if you NEED a car - lord knows why - Manhattan is not the place to be, you may want to consider living in an outer borough. Why? Well parking in Manhattan is quite expensive, the monthly fee for most lots in the city START at $350-$450/month. Tack on insurance, city mileage, wear and tear from potholes and parallel parking scrapes and life with a car in Manhattan is horrible. take this from someone who had 2 cars in Manhattan - one in a lot and one I used to move from side to side on street cleaning days - HORRIBLE! They clean the streets like every other day in manhattan so you can spend 1-2 hours a day trying to find a spot, easily. The Mass Transit system is great in NYC, Bus, Train, LIRR, Metro North, Taxi's, etc...from JFK, to the beaches, you really don't NEED a car. Now I live in Brooklyn, I have a driveway for 2 cars, 1,300 sq ft apartment, and the N or F 5 blocks in either direction, 40 minutes into manhattan....the good life I say. Link below to all public transportation maps in NYC.