I'm currently working under the assumption that all of Pain's bodies are already dead. And the 3 Jiraiya "killed" weren't ressurected, they just were able to move again once the swords were pulled out of them.

I say this because this is actually the second time they showed us this Jutsu of Pain's.

The first time was in the very beginning of Shippuuden. When Akatsuki was taking Gaara. Remember the jutsu where Pain was able to take two bodies, and give them all of the abilities and part of the chakra of Itachi and Kisame.

I think what he's doing now is similar. These are dead bodies that he's infused with the powers of other ninja.

I think this is what the Rinnegan's real power is. Allowing the user to control all these bodies at once and to use the powers of others through them.