Narita-Tokyo-Nikko-Tokyo-Kyoto-Himeji-Osaka-Kansai airport

Dear Daniel

My coming trip is as follows

4 Nov: Arrive Narita -> train to Tokyo. Visit Tokyo
5 Nov: Train to Nikko. Train back to Tokyo
6 Nov: visit Tokyo
7 & 8 Nov: working in Tokyo
9 Nov: train to Kyoto
10 Nov: visit Kyoto
11 Nov: Train to Himeji then to Osaka
12 Nov: to Kansai airport

Please advise me
1. if the schedule is tight? (I travel with my mom who is 70 years old.
2. should i buy the 7-day JR pass?
iif i skip Nikko then does it worth buying JR Pass?

1. can i use JR Pass for train from Narita airport to Tokyo?
   if not, what is the alternative?

2. how can I travel from tokyo->nikko-> back to tokyo-> to Kyoto-> Himeji-> Osaka by train and how much it costs for each of those?

3. I stay in total 8 days in Japan and I dont need to use JRpass on 12th Nov since night 11th Nov I will stay close to Kansai Airport. if I active the JR Pass on the 4th Nov ( to use for train from Narita to Tokyo) then up to what day i can use it? to 11th Nov?
4. if I travel within Tokyo then does JR pass help? do i need to buy ticket for bus and metro?

thanks a lot
Bach