I am studying in Spain next fall and would like to travel a bit before my classes start. I would like to visit France, Italy, Germany and Poland. What are my options for reasonably priced travel? Would it be cheaper to ride by train or fly? Do I have any other options?

I want to travel in Frankfurt, Cologne, Munich, Marseille, Barcelona, and Madrid. The modes of travel I found were either Eurail Pass or Ryan Air. Ryan air however doesnt land at Marseille. Please help. Also if you have used any of these travel methods, kindly state your experience with them. Thanks.
Also, could you suggest a travel itinerary, I will be traveling from 14 may to 23 may. Thanks again.

I am thinking about going on holiday to majorca, spain at the end of october time this year. I have already been on holiday there in july this year, and had an amazing time, so we were thinking out going again. I know the weather won’t be as hot, but I would love to go again. Does anyone know what the weathers like there in october? Is it worth going? Will it still be suitable for sunbathing and going in the pool?