How can I delete my passcode altogether?

There are multiple ways to update iPad. The easiest way is to do that in the Settings app. Follow below steps to reach the aim.

1. If a pop-up panel tells you that iTouch latest version is available, you can then tap on the button of "Install Now" to begin to update to apple iOS latest version.
2. You can also manually check out if the apple iOS latest version is available now. Now you can follow the steps shown below to have a try.
a) Connect your iPod to good Wi-Fi connection and make sure your iPod storage is enough and the battery is able to support the iPod update.
b) Click on "Settings > General > Software Update" successively.
c) When your iPod has detected an apple iPod latest version, you can click on the button of "Install Now". If a dialog requires you to delete some apps temporarily because the new version needs more storage, you can click on "Continue" to uninstall the apps. If you click on "Cancel" button, your apps will not be uninstalled.
d) After that, iPod will begin downloading and installing the apple iOS latest version in no time. Wait until the update is finished.

The process to update to iTouch latest version is not hard at all. Actually, before the update, you can manage your iPod files to make some room for the new version or to make the process much smoother. The next two parts will instruct you how to manage files via iTunes or iTransfer in detail.

For more methods, check: How to Update iPod to the Latest iOS Version

Is there anything wrong with the passcode? If your iPad is locked and you forget the passcode, please follow the steps below to unlock it.

1.Connect your iPad to your PC or Mac.
2.Select your device in the iTunes sidebar, and click the"Summary" tab.
3.Click "Check for Update". iTunes will show you if there any new version of iPad software is available.
4.Click "Restore iPad". You can finish the restore process by following the instructions given. During the process, a recommend that tells you to back up your files will be given. You can restore your data after the process is complete.

Now, you must have restored your iPad.
Note: Even you bring your iPad to the Apple service center, Apple staff also need to restore your iPad to unlock it. That's to say, you need to erase everything on it.

http://www.leawo.org/tutorial/forgot-ipad-screen-lock-password-how-to-recover-data-from-locked-ipad.html

If you remove the update does it play? Have you gone to the Apple site and asked others about this issue.

It may be too full. Check how much free space you have. Try to have approximately 3GB free. Delete things that are easy to replace like apps, or music you can download again.

if you delete the app Facebook then reload it and it should re load fine

If its asking for an apple ID or iTunes account password then you need to sign in with that. If you forgot it you can recover it using the email account you signed up with. If you have a lock code on the tabket then it may be that one. You can sometimes sign out of itunes and sign in with a new one as well. This is a security feature to prevent apps from auto updating and wiping out settings or other people screw with it.

Hi! Go into your settings click in pass codes then it will tell you to type in your password then you can follow the prompts so very easy I hope I helped you! Stacy Evers :)

Check out this Apple article. Update the iOS software on your iPhone iPad and iPod touch
It explains the different ways you can update your iOS.

Tap settings,tap general, tap passcode lock,enter current passcode,will give option to turn passcode off or change,plus other settings.tap home to save.