how can i upgrade to mac os x 10.6.8
You can't. Mac OS X 10.6 requires an Intel Mac.
You can't. Snow Leopard requires an Intel processor. It cannot be installed on a G4 or G5 or any older model that does not have an Intel processor.
how about mac os x 10.6
Anything newer than 10.5.8 requires an Intel Mac. Places such as Amazon and eBay sell retail Mac OS X 10.5 DVDs.
so am not goin to be able to use my iphone on this ibook
If it's an iPhone 5, you can't. If it's an earlier iPhone, install Mac OS X 10.5.8 and iTunes 10.6.3 on it.
an for iphone 4
The iPhone 4 falls under 'earlier iPhone' in my previous post.
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