No
Yes, you can use the iPhone PC cable to copy music from your iPhone to PC.
on an ipod touch or an iphone yes, but not on any other ipod
Yes if you have iOS 4.3.3 or below you can go to jailbreakme.com on your iPhone then click download and it installs cydia ready for you to tweak stuff and download stuff.
Skype can be used on both a PC and an iPhone to make video calls (See links below).
iCloud storage is only for storing files from your iPhone, iPod, or iPad devices.
I don't believe the iPhone 3G can update past 4.2.1, but any newer iPhone can update the same way you normally update an iPhone through your iTunes authorized computer.
I'm assuming this is old as the iPhone has been out awhile, but no there is no return policy with Apple or AT&T.
You can get free ringtones for your iPhone by downloading them at zedge.net or itunes.apple.com.
Yes, it is for At&t, this is the only way to use a different service with the iphone, use Blackra1n to jailbreak your iphone, then use bootneuter in cydia to unlock iphone to any service. PS: downgrade firmware to 3.1.2. before running Blackra1n.
Cholla was played by John Quade in the 1980 Clint Eastwood film "Any Which Way You Can".
No, but the iPhone does. Iphone does