Can't sync iPhone 4 iOS7 with iTunes
I have a MacBook OS X version 10.5.8, which runs iTunes in 10.6.3. I recently upgraded my iPhone 4 to iOS 7, after being prompted by Apple, only to realise that it won't now sync with my version of iTunes.
When I check for software updates, I'm told that my computer can't upgrade and therefore neither can my iTunes. So it looks like I'm stuck with a MacBook OS X 10.5.8 and an iTunes 10.6.3, when I'd need itunes 11 which my machine won't support.
I'm aware that my MacBook might be 'obsolete', although I purchased it 4 and 1/2 years ago and it works perfectly fine otherwise.
Is there anything I can do apart from buying a new laptop - which I can't afford?
Thanks for your help!