IPad will not accept I agree on terns and conditions for iCloud, I agree disappears for a minute then reappears

Steps to delete iCloud account on iPhone/iPad

1. Tap on the Settings app and then scroll down to find iCloud.
2. Tap on "iCloud" to open it.
3. Scroll down until you find "Delete Account" and then tap on that.
4. Tap on "Delete" again to confirm the deletion of the iCloud account.

Dont panic

You can attach some flash drives to Apple's $29 iPad Camera Connection Kit. (If you have an iPad with a Lightning connector you'll additionally need Apple's $29 Lightning to USB Camera Adapter.) Let me underscore some. Some flash drives require more power than the iPad can provide and won't work.

For the second question, here's also a guide to help you back up iPad music to iCloud.

1. Connect your iPad to a Wi-Fi network.
2. In iOS 8 or later, tap Settings > iCloud > Backup. ...
3. Make sure that iCloud Backup is turned on.
4. Tap Back Up Now. ...
5. Make sure the backup finished by tapping Settings > iCloud > Storage > Manage Storage, and then select your iPad.

If you have a new computer, you can also backup iPad music onto it.
http://www.leawo.org/tutorial/how-to-sync-iphone-to-new-computer.html

New iCloud removal service available contact accessonesolutions.com for more details. Reported lost/stolen units not accepted.

If you have iTunes installed on your computer you can back up all your apps and data on your computer. Then you should be able to plug in your new iPad air and migrate all the data to it.

1. Turn on your device. When you first turn on your device, you'll see "Hello" in different languages. Slide from left to right anywhere on this screen to begin.
2. Select your language and region.
3. Connect to a Wi-Fi network

You need an Internet connection to set up your device. Tap the name of the Wi-Fi network you want to connect to. 
4. Enable or disable Location Services. This setting lets certain apps gather information about your location.
5. Set up your device as new.
6. Agree to terms and conditions.
7. Sign in or create an Apple ID.
If you need to, you can create an Apple ID for free. Or, you can tap Skip This Step to sign in or create an Apple ID later.
8. Upgrade to iCloud Drive.
With iCloud Drive, you can store your files in iCloud and access them anytime on any supported device. Or choose Not Now to setup iCloud later.
9. Set up iMessage and FaceTime. Or choose not now to setup later.
10. Set up Touch ID.
If you have an iPad Air 2 or later, or iPad mini 3 or later, you can set up Touch ID. With Touch ID, you can use your fingerprint to unlock your device and make purchases.
11. Create a passcode.
To protect your data on your device, use a passcode to unlock your device. If you don't need a passcode, tap Don't Add Passcode. If you're using Touch ID you have to create a passcode.
12. Set up iCloud Keychain.
iCloud Keychain keeps your Safari website usernames and passwords, credit card information, and Wi-Fi network information up to date across all of your approved devices.
13. Choose whether or not to use Siri.
Siri lets you use your voice to send messages, schedule meetings, place phone calls, and more. Or choose Don't use Siri to setup later l.
14. Choose whether or not to share app analytics. Choose don't share.
15. Choose display resolution.
16. Start using your device.
Tap Get Started to begin.
Cheers :-) congrats for new ipad and i hope these instructions will help you.

Can you log in from another PC and change profile settings?

You will have to go to iCloud and click on "forgot my password" and will get an e-mail to reset a new one.

At what point is it not working? Are you pressing delete and they won't go away? When you press delete, does nothing happen? Do they disappear to begin with only to reappear later?