Can I go back to an older version of iTunes that'll support both my iPhone 4S w/iOS6 and my MacBook running Leapord 10.5.8?

Can I go back to an older version of iTunes that'll support both my iPhone 4S w/iOS6 and my 2009 MacBook running Leapord 10.5.8? I simply want everything to work the way it had been forever until recently. However, I can't imagine Apple would intentionally make their own products obsolete by rendering them useless through a software "upgrade." My MacBook is only 3 yrs old so I feel like I am simply missing 1 piece to this puzzle in order for things to start working again. I have my MacBook, iPod and iPhone 4S all set up to install updates automatically so if I need to uninstall certain updates and revert back to ones that work will that even be an option? Thanks