The iPod Nano does not use apps.
no you cannot use ipod and iphone apps on itunes, but you can buy the apps on itunes and put them on your ipod and iphone
First download the apps onto your computer using iTunes. Plug in your iPod to your computer, open iTunes, and set the sync settings so that you can download apps to it, sync your iPod and you should see the apps on there. This requires an iTunes account.
The iPod Nano cannot use apps.
Yes u do
The apps available from the iTunes store will only work on Apple's iPhone or iPod Touch.
It depends on what kind of ipod it is. If it's an ipod touch then just put your i pod into the computer and press sync. Ipod touches are the only ones that can have apps.
Yes, but downloaded apps from Installous will not sync with iTunes.
you can restore your apps from your itunes, if not you can use same ID as you used for your lost apps and download from app store. If you buy app once then you can download using same ID as many times as you want. You do not have to pay again.
go to file in the itunes page and click transfer purchases. ..... this will take some time
You open itunes (can be downloaded from apple website) and set up your ipod and then click on file and then Sync
Yes you can you have to download appsync from cydia if you want itunes to sync your apps.