Sleeper charges are per person and depend upon the accommodation requested, and the distance and route traveled. Couchettes are open bunks in a compartment, each with a pillow and blanket. Usually located in 2nd Class, they accommodate up to 6 people. There is no distinction by sex, so you should expect to sleep in your daytime clothes. At major train stations porters may sometimes be available to assist with luggage.
Luggage carts are available in most main-line stations.
They are often coin operated. It is always best not to travel with more luggage than you yourself can handle. Train stations are located within many European airports. For such an event we recommend travel insurance. You will receive an application for travel insurance with your travel documents.