Worth it to buy a pass?

My family of 13 and I are traveling to Japan this May and would like to ask if it will be worth it to get a JR Pass and which pass would give us the most savings?

Day 1 - arrive at Kansai Airport, travel via Shinkansen to Kyoto
Day 3 - Travel from Kyoto to Osaka (round trip)
Day 5 - Travel from Kyoto to Tokyo via Shinkansen
Day 10 - Travel from Tokyo to Narita Airport

Would also like to ask which trains to take from Kansai to Kyoto?

Thank you!