Your iPad1 is long ago obsolete and now totally unsupported.
Multiple recent posts suggest that Apple has removed all server-side and re-activation support for obsolete 32-bit devices:
- iPad1
- iPad2
- iPad3
- iPad4
- iPad mini1
As such restoring and re-activation of your iPad1 may now be impossible, rendering the iPad unusable.
App Developers have also dropped all support for 32-bit devices - and have withdrawn older versions of their Apps from the Apple App Store. Withdrawal of Apps supporting older models of iPad is making their utility and usefulness significantly of these older models even more limited. Even if you are able to restore the iPad1, you’ll not be able (re)download or (re)install any Apps from the App Store. Most online services also require capabilities not supported by your iPad.
Sorry, while perhaps unwelcome news, your iPad1 has reached the end of the road.