Regardless of whether you are planning on real travel or just daydreaming, the schedules for trains all through Europe are available online. GO RAILWAY, or in German GO BAHN, is a listing and reservations system for all European railways. It is a bilingual system, with information in both English and German.
The interface is simple, and the only time you might have a question is when you want to type in the name of the station--they are all listed in the local language. For example, I tried keying in Bucharest, and found that the schedule lists it as Bucaresti Nord--North Bucharest. But other than that, it's simple. You can obtain information about stations by checking station services such as taxi, porter, and car rental, and information about the train on which you want to travel, such as whether it has a restaurant car. Remember, a couchette is a type of sleeper compartment.
You can only make reservations and purchase a ticket if part of your trip is through Germany. The travel documents are sent through snail mail. Inside Germany, it takes about three days to get your ticket.
