Can I get wheelchairs to get around at stations, etc?
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Europe is not like the US where so many place are handicap accessible. While most airports are modernized train travel is quite different. I would try to plan as far in advance as possible. Many train stations have few if any lifts (elevators) if you need to change trains it can be very difficult.
I think it would be helpful if you let us know what countries and what cities. Some are better than others. I know Lufthansa has a great service to assist travelers with disabilities, and you can make arrangements with the Deutsche Bahn for assistance too.