New York City has many options for travel:
Taxi cabs are an easy option. A great fare estimator and cab info is at http://www.taxifarefinder.com/main.php?city=NY
In New York City, you cannot call to reserve a cab--you must hail it on the street. A taxi can fit a group of four. Find out more information at http://gonyc.about.com/a/taxi.htm
However, you can call for "Car Service." This is a little more expensive than taxis, but can be reserved for a particular time and accomodate more than four people. Click here for a listing of car service providers: http://gonyc.about.com/od/gettingaround1/a/nyc_car_service_2.htm
The Subway is another great option. If you're new to NYC, they may be a little intimidating, but can be fast and easy once you're prepared. Find out more about how to ride the system here: http://gonyc.about.com/od/gettingaround1/tp/subway_tips.htm
To plan a subway trip, click here: http://tripplanner.mta.info/MyTrip/ui_web/customplanner/tripplanner.aspx
Subway fare is $2.50. Note that subways do not go directly to JFK, but there is an AirTrain. See http://gonyc.about.com/od/gettinghere/gr/airtrainjfk.htm
Driving in New York City is not recommended. However, for those who are driving, there is on-street parking near both Hunter and Pratt.