I've been reading some sites on train travel and it's very overwhelming. I'm still not sure what I need to do. I understand that within a country in Europe, its best to purchase from respective sites, but I've no clue what to do between countries. I also don't know if it's advisable, or even possible, that I use the same train pass (the one for getting from country to country) for train passes within the country.
Over the course of 2.5 months, I need to go from Italy to Austria to the Czech Republic, to Germany, to Sweden, then Belgium, and finally France.
What do I do for the train rides between countries?