need help thanks :)

hello ,
we are two people traveling to japan in april 2017 ,i would like to know is it better for me to get the jr pass then buying individual tickets? my travels are day one -osaka to kyoto day two- osaka to nara
day three- osaka to hiroshima
day four- osaka to kinosaki onset
day five - osaka to tokyo

and i also want to know all these places can be reached using the jr pass right? and also how long before can i purshase this jr pass and does it have an expiry date and how do i buy it in mumbai (india) and also the cost thanks this for april 15 to 22 nd thanks :)