Tokyo - Osaka - Kyoto - Japan

Hi,

Need assistance. Will be travelling to Japan in March.

Itinerary:
1) Haneda Airport to Tokyo on 6 March
2) Tokyo - 6 to 9 March
3) Osaka - 9 to 11 March
4) Kyoto - 11 to 13March
5) Tokyo - 13 to 15 March
6) Tokyo fo Haneda Airport on 15 March

i) How many days of JR pass should I purchase?
ii) Should I purchase Suica card while commuting in Tokyo?
iii) Do I have purchase any additional cards while commuting in Osaka in Kyoto?

Many thanks in advance!