To view the ending, just cash out at the desk. All the endings are the same, showing you leaving Las Vegas in a vehicle. However, the vehicle you leave in depends upon how much money you won.
$0: Bus.
$1-$9,999: Taxi.
$10,000-$19,999: Green car.
$20,000-$69,999: Orange car.
$70,000-$139,999: Limousine.
$140,000 or more: Red sports car.