should i buy JR pass

Hi, i am travelling to Tokyo to Osaka from july 12-17 with husband and 7yr old daughter.

Below is our itineray, kindly guide me if it is worth it to buy the JR pass or should we just bu the suica card
12-15 Jul Tokyo staying in Shinjuku 15 Jul travel to Osaka via bullet train
15 Jul osaka or kyoto half day tour
16jul USJ
17 jul osaka then go to Kansai 9pm fly to Manila

can i use also the JRpass from Osaka to Kansai airport