This can vary quite a bit. Not including airfare, you could do it for as little as $1500 to as much as $10,000. If you stay in cheap hostile type places then you could do it pretty cheap. Hotels are expensive in Europe, but the exchange rate is in your favor right now. You can stay in fairly cheap guest type houses which are rooms folks rent out to travelers. This is quite popular in Germany.
Be sure to buy your train Eurorail tickets in the USA before you leave. They are cheaper and you can buy unlimited travel for a period of time. We've done this and it worked great.
Depends on what tour you mean to be honest.
$20,000 each
The European Tour was created in 1962.
its free
European Poker Tour was created in 2005.
Ladies European Tour was created in 1979.
The cost of a complete tour is (from June 2014) 45 lei (cca. 10 euros).
The most amazing experience in Peru would be to visit the city of Macchu Piccu. A guided tour would cost several hundred dollars, but it would be well worth it.
about £20 - £30
I think it depends on the company
The cost of a ten day tour of Peru varies from location to location and travel agency to travel agency. One should contact different travel agencies to determine the price.
There are no commercial accommodations on the Antarctic continent. You may be able to find a tour of this duration.