I have found a iPad it’s is very old and is locked not sure what to do with it ?

Without the Apple ID and Password of the original owner, you will never be able to use the iPad. Activation Lock is a theft prevention feature that cannot be by-passed. You can recycle the device at any Apple Store. Read this link...

How to remove Activation Lock - Apple Support

Recycle it. It won’t run current apps, won’t run current iPadOS, and it’s theft-locked. Without original purchase receipts showing he serial number or similar legal paperwork or that Apple ID and password, it will never be useful to you, and no one here will unlock it, and Apple will not unlock it. Again, recycle it.