Is there a shuttle from your location to the Key Blue terminal?

The air train is very easy, quick and free to all terminals and from federal circle it is free.

Is that a mistype of "jet blue?" If so just take the airtrain to federal circle station.

They can drop you off at other locations as long as it's not too far.

Enterprise also has a shuttle that will take you from the Enterprise location to the Federal Circle AirTrain stop. It's about a 5 minute ride on the AirTrain to the JFK terminals.

Enterprise themselves gives you a shuttle bus to the airport. Not sure what is meant by Key Blue