Travel cost + advice for Europe?

How much money would you estimate total for this? Two people traveling through Europe for a couple months (plane tickets included). We would be traveling pretty cheaply, staying in hostels or cheap hotel if we can, and traveling by train. And can someone explain a Euro pass and give its cost? Please, just the total... show more How much money would you estimate total for this? Two people traveling through Europe for a couple months (plane tickets included). We would be traveling pretty cheaply, staying in hostels or cheap hotel if we can, and traveling by train. And can someone explain a Euro pass and give its cost? Please, just the total estimation for a trip like this. Thanks!
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