Yes. You don't need a computer to have an iPad. You will need a WiFi or 3G connection to download apps and music.
Yes you just go to the itunes app on your ipad and then do what you want from there.
No, you can own an iPad without an Apple account. You will not be able to purchase apps from the Apple app store without an account. Most people charge the purchase of apps to a credit card, but you can use iTunes gift cards to purchase apps if you do not have a credit card.
Use Itunes it will be easiest.
Use iTunes on your computer and sync.
Connect your ipad to your mac with the cable. Then, use itunes to move your music over to your ipad.
Gift cards can be redeemed on the iPad by opening the iTunes or App Store apps and clicking the Redeem button found by scrolling to the bottom of the page.
Yes, if you go to the apple store or itunes app on your ipad, theres a redeem button on the bottom somewhere and then you put the code that the itunes card have.
You create the Apple ID on iTunes or on the iPad itself.
Use the App Store within the iPad or iTunes on your computer when the iPad is plugged into it.
You can not use iTunes on android. But you could transfer all your iTunes data to android by Jihosoft iTunes to android transfer if you want.
You cannot use a USB storage media for sending storage on an iPad. You need a computer with iTunes. You could make a backup using iTunes and store that backup on a USB drive, but you still need iTunes to restore it to the iPad.
You can use MobiKin Assistant for iOS. Just connect your iPad to your computer, open the program, go to the "Music" tab, and click "Import" to add your audio files directly — no iTunes needed!