Great way to travel if you are prepared to rough it if necessary. Definitely something that everybody should try at least once in my opinion. On the other hand, in this era of low cost airlines it may be possible to fly from place to place on a shoestring. However travelling by train and seeing the changing landscapes from other than 30,000 feet up is part of the fun. Interrail tickets are for students or under 26s (?) or something like that. They used to cover most of Europe with some supplements payable (e.g. for certain trains - e.g . TGV - routes, ferries etc.). However these days Interrail tickets are zoned to different regions of Europe. In some cases buying an individual national rail ticket covering several day's travel might be a better bet. Eurrail tickets are the equivalent for non students or over 26s (?). As far as I know USIT can give you info on these schemes. Alternatively most Rough Guide or Lonely Planet books have a bit on them.