Travel To Japan...Help!

Hello!

we will arriving with a friend in Tokyo on 15th and we will need to buy a JR pass for one week since we will spend 7 days in JP (approx 3 says in Tokyo and 2 days in KYoto and one day In Osaka).

we will be landing at the Narita airport and we will need to get the JR pass and also a wifi connection there.

can you suggest where the JR vendor is located at the airport?

After we will have to leave for our airbnb which is located downtown at the Shinokubo station.

any suggestion on how to get there?

we will need to travel from tokyo to kyoto on 18th...where is the train station in tokyo which leave for kyoto?

Thanks a lot for the help!

Elena