To upgrade the software that came with your Mac simply click on the Apple menu in the top left corner of the screen and select Software Update. The computer will then check what software updates are available for your system. If you do not want all of them you can choose which updates you want to download and have automatically installed.
You do not have to delete itunes to upgrade. Simply click HELP > CHECK FOR UPDATES
Upgrading iTunes is free.
You do not have to upgrade to Safari 4. It is optional.
Upgrading from iTunes 10 to iTunes 11 will not remove any songs from your library.
It won't harm anything, if you are really worried and don't want to update it, don't update it, or you can just wait till the next upgrade to upgrade the iPhone.
When iTunes is upgraded, it preserves your music library so just run the upgrade process and you'll be fine
Yes.
connect it to iTunes then press upgrade
Click on 'Update' in iTunes!
You don't have to upgrade iTunes, you just can set your ipod touch to a "replacement" even though it's not.
Upgrade to iOS 4 in itunes.
you have to wait for the offer to come up in the store saying that some items may need you to upgrade and then you click it.