they vote for a new one
Yes, there is a pension paid to ex-presidents.
the vice president takes over
A high five A high five
If you are asking where President Obama will live once his second term is over (presidents cannot run for a third term), he will probably move back to Chicago, where he and his family still have a home, and where he used to live before he became president.
If the president resigns or is killed while in term, the vice president takes over his job.
all of them
Absolutely.
It lapses
The Vice President becomes President and completes the original Presidents original term of office.
George W Bush and Barack Obama
fatigue!
Nine presidents had their terms finished by the vice-president, Eight of these died in office-( four from assassination and four from natural cause ) and one resigned before his term was over.