Guard's Van or a caboose.
The caboose
traditionally, it was called the caboose. Cabooses are rarely used anymore. A local train may use them as a shoving platform if they are making long reverse movements. The caboose was replaced with the EOT (End Of Train device). So today the last car is just another rail car and doesn't really have a title and is generally referd to as simply the rear car.
When the car is being hauled on the train.
An engine heads a trains, with cars behind it, and the caboose the last car. NOTE: If a train is heavy with freight, it may have several engine 'cars' pulling it, AND even pushing it from the back. NOTE: There are several types of train "cars".
caboose
It used to be a caboose which was used by the trains crew.
The luggage room is the "baggage car" between the two VIP passenger cars on the train. There is another "freight" baggage car near the back of the train.
There are generally 3 types of cars at the head of a atrain. The car at the head end of a train is most oftena locomotive, but it can also be a "cab car", which has a cabin for the train operator/motorman/engineer, but is not a locomotive. For many transit systems, this car may be a Multiple Unit (MU) or Electrified MU (EMU) car. In most cases, when a freight train is seen with a freight car at the head of the "train", under US law, this is most often not termed a train, but a "consist" - this is because it fails to have the markers necessary to move legally as a train.
A average freight train going 50 mph (80 km/h) will take up to 1.5 miles. That is how long a freight train takes to stop if it collides with a car.
1408 cars
It is called a Caboose in America. In British terminology may be called a brake van or guard's van.
It used to be a car for brakemen and conductors called a caboose or waycar modern freight trains have a Flashing Rear-End Device "FRED",placed on the rear coupler of a train to monitor air-brake system integrity and air pressure. Also known as an end-of-train (EOT) device.