No more than 10 minutes once downloaded
By installing them and opening them. iOS has backward compatibility.
About 3 hrs depending on the amount of memory on your device taken up.
You should be able to. Speculation at this point is that users with ios6 will be able to upgrade to ios7 with no problems.
it takes .93 on ipod
You have to update your iPad 2 to iOS 5 if you bought it prior to the launch of iOS 5. You can update now to iOS 6 (and soon iOS 7), by plugging your iPad 2 into the computer you authorized with your iTunes account and waiting for the pop up that will ask if you want to install the new software update. The process should take 1-2 hours.
Yes, Apple iOS 5 is free.
The apple iOS 5 update IS OUT NOW
You cannot. If you buy a new iPod or iPad or iPhone, it comes in iOS 4.3.3 and you have a choice to update to IOS 5 or not.
The apple iOS 5 update IS OUT NOW
Yes you can.
You can update it to iOS 5 the same way you update it to any other iOS version. The 4th generation (and indeed the 3rd generation) iPod Touch can be updated to iOS 5.
iOS 5.1 untethered jailbreak