My iPad software crashed after updating it

Creating and using a new AppleID will simply compound any problems that you may be experiencing.

First, you need to understand that all Apps purchased through the Apple App Store are forever tied to the AppleID account from which the purchase is made. App purchases cannot be transferred to a different AppleID account. If you intend to use a completely different AppleID account, you will have to re-purchase your Apps.

An AppleID account is intended to be used for life - updating your primary email address (this being the username that identifies your account) as necessary. Likewise, your secondary (recovery) email addresses and trusted telephone numbers should be similarly updated to reflect inevitable changes to our circumstances as we move forward in our lives.

Next, understand that your iPad will have an Activation Lock that is associated with the AppleID account that was last used to “activate” the iPad. Without this AppleID and associated password, you are not going to be able to use your iPad with a different AppleID account.

Given the above, you will hopefully now understand that to use your iPad - and reinstall any purchased Apps - you need to recover and use your original AppleID account credentials.

Is the iPad disabled, or Activation Locked?

Activation Lock

Here are the Apple support pages that outline the Activation Lock - and the only mechanisms by which it can be turned off:

Activation Lock for iPhone, iPad, and iPod touch - Apple Support

Turn off Activation Lock – Apple Support

As you will discover, unless you are the owner of the AppleID that was last used to activate the device, or unless you can secure the cooperation of the previous owner, you’ll not be able to defeat or bypass the Activation Lock. Without documentary evidence that you are the original owner (such as sales receipt showing the serial number), Apple won’t assist - and nobody here will be able to help you.

If you have the necessary documentation, Apple have recently introduced a new portal though which you may be able to request release of an Activation Lock:

How to remove Activation Lock - Apple Support & start an Activation Lock support request.

Disabled

If your iPad is disabled, or you have forgotten your iPad passcode, you’ll need to follow this process:

If you’ve forgotten the passcode on your iPad, or your iPad is disabled – Apple Support

You’ll need access to either a PC (with iTunes installed) or a Mac (with iTunes or Finder - as appropriate for the installed version of MacOS).

AppleID

You’ll need the AppleID and associated password. For which you’ll need the owner to assist. If these credentials have also been forgotten, they can be recovered by the owner here:

https://iforgot.apple.com

To recover your credentials, you’ll need access to any one of the following:

• Your primary email address mailbox that corresponds with your AppleID
• Any of the secondary/recovery email addresses that should be configured for your AppleID account
• Any of the trusted telephone numbers (fixed line or Cellular/Mobile) that are associated with your AppleID

Unless you AppleID account has not been fully/correctly configured, or has been seriously neglected, recovery of the AppleID and password should not be difficult.

More information about recovery of your AppleID:

If you forgot your Apple ID - Apple Support

More information about recovery of your AppleID password:

If you forgot your Apple ID password - Apple Support

When you recover access to your credentials, you would be well advised to log-in to your AppleID account from a web browser - and verify/update any email addresses and trusted telephone numbers:

https://appleid.apple.com

If you intend to reuse the iPad with a different AppleID, you would be well advised to prepare it properly for reuse - as this will ensure that the Activation Lock associated with the original AppleID is removed, along with all data and other sensitive information:

What to do before you sell, give away or trade in your iPhone, iPad or iPod touch – Apple Support