Is car insurance higher in New York or New Jersey?

Assuming you mean New York City, by traveling west. You have a choice of trains, bridges and tunnels. From Rockland County one travels south.

To register a car in New Jersey you needCertificate of TitleProof of New Jersey insuranceProof of your Social Security number or exemptionThe current odometer readingYour driver's license or, if you...

Yes, on a road trip or holiday or you could park it there and walk

A Saleen S7, Ferrari enzo, Bugatti Veron, and a Mecedes Benz MClarren

They are separate states, so no, New Jersey is NOT in New York. No. It is a separate state and located adjacent to New York.The Hudson River separates New York and New Jersey.