what train pass or seperate tickets?

Dear sir, madam,

Can you give us advice what to do:
we will be travelling in Japan from the 29th of Octobre till the 12th of november. We start and end our journey in Tokyo. We are thinking about:
Tokyo (2 days)
Mount Fuji (2days)
Kyoto (4 days, with possible dayvisits to other places like Kobe or Otsu)
Nara (1 day)
Hiroshima (1-2) days)
Tokyo (2 days)
Which train pass/passes will be best suited? And if a slight change in our itinairy will save us a lot of money we would like to hear so:)
Thank you very much!

kind regards
BIrgit