Whats included in warranty for new car and how long its lasting?

That will depend on the individual vehicle manufacturer. Each has their own warranties and what they cover and for how long, and it differs. The best thing to do is to go to each vehicle manufacturer's websites you are interested in and it should outline their new vehicle warranties. There are also federal warranties on certain parts of the car such as the emissions systems that are mandated by the government.
Basically most manufacturer's warranties cover most areas of the vehicle including drivetrain, interior and exterior body parts,etc. Tires generally are covered separately by the tire manufacturer's warranty.