When you plug in your iPod to your computer or laptop with the connector provided when you purchase the iPod. It should prompt you that there is a newer version available for your iPod, before you update it make sure you back everything up becuase it will restore your iPod and you wil lose everything but if you back it up you can sync it all back on to your iPod.
iBooks if available on 2nd, 3rd and 4th generation iPod touch with the iOS 4.0 update or higher. Since 1st generation does not support iOS 4, iBooks is not supported for 1st generation iPod touch.
Sadly, no. The latest version of iOS for the 4th Generation iPod Touch is iOS 6.1.5.
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.
Text free is a good app for any iPod touch generation. On the new 5.0.1 update on the iPod touch 4 th generation there is a app that is automatically downloaded that is for texting.
The 4.0 update, which only works on 3rd generation iPod Touches, allows the iPod Touch to have the same multi-tasking capabilities as the iPhone 4, allowing the iPod Touch to run several apps simultaneously without having to keep relaunching an app.
Assuming you have at least a 2nd generation iPod Touch (1st generation iPod Touches do not support iOS 4.) simply plug your iPod Touch into your computer and open iTunes. You will be automatically prompted to update your iPod Touch. If not, find your iPod on the left hand side. Click your iPod and your iPod's information will open. Click the button labelled "Check for updates" and your iPod Touch will be automatically updated to the latest iOS version.
This only works on iPod touch third generation, iPad,or iPhone and you have to have iOS 4. If you are using the second generation, you will have to jailbreak you iPod touch.
1st and 2nd Generation iPods do not have the capability of running on iOS 4. If your iPod does have capability, then you will get a reminder to update the software when you plug in your iPod to iTunes.
ipod touch 4 has 2 cameras, retina display, ios 4.0, multitasking etcect
yes
No it does not
Backgrounds and multitasking are only available on the iPhone 3Gs, iPhone 4, iPod Touch 3rd generation, and iPod Touch 4th generation.