ipad is locked to owner

You’ve encountered Activation Lock.

Without the prior owner’s cooperation, the device will remain unusable.

More detail is available here:

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

Also, while you're learning about owning a totally useless device, read this --> The All Too Common SAD Reality of Buying … - Apple Community

where did you get it from? If you found it and tried to use it, you can’t.