Paying full price for train travel in Europe will become very expensive. After living in a European country for more than 6 months, you are eligible to purchase an Interrail Pass, or a EuroDomino pass. Detailed information on these two options may be obtained at major train stations in Europe. Besides Eurail passes, most European countries offer special deals for train travel within their borders. For example, in Germany a card called the Bahnkarte costs 120DM, and it allows you to pay half price for travel on any train within Germany.
Similar passes are available in other European countries.
Fest-Pass is a ticket to festivals between June and August taking place throughout Europe. It'll get you in free in at least two events at each festival. It is great for people going abroad for the summer. Before you leave the United States you need to check on visa requirements for the country you will be living in. If you will be traveling to neighboring countries, you should check on visa requirements for these countries as well.