Haneda Airport - Tokyo- Osaka- Kansai Airport

Hi,

My itinerary breakdown is as follows:

1st day: Haneda - Asakusa
2nd: Asakusa
3rd: Tokyo
4th: Tokyo
5th: Fujikawaguchiko - Mt Fuji
6th: Osaka shi
7th: Kyoto
8th: Osaka shi - USJ
9th: Kansai

1) Can the JR pass be used throughout from Haneda- Asakusa - Fujikawaguchiko - Osaka shi - Kansai airport?

2) Is there a need to buy other rail pass on top of the JR pass?

3) Is it more economical to buy the 7 day JR pass or buy the day use passes?

4) On which day should I activate the 7 day JR pass as the trip is 9 days?

Appreciate your advise. Thks.