Query on cost of living


I have got an offer from my current employer to relocate to US. Our office is in NYC and I will have to go their on L1 visa.

My family consists of 3,my wife and a two year old kid.

What should be the salary I can negotiate to live a normal life, no lavish for sure.

Also, it would be very helpful if someone can tell me where should I search for cheap affordable house in close proximity to my office at NYC.

If I buy a second hand car, how much it would be with the insurance charges as well?