[Wasabista]

1) Lots of them including a day pass and weekly pass. Others available between specific stations once you have a job. Useful if you plan to use the metro intensively during that time.
2) Absolutely! Both are, but Kyoto and Nara more so.
3) Nah.
4) About the same as Washington DC.
5) With your sexeh laydeh! Christmas is a romantic holiday here, take your Japanese girlfriend to dinner and then a love hotel.

As for football, lots of clubs advertised in local free gaijin rags, just join up and don't be shy.