trying to activate my old ipad but it has the find my device on and i cant remember the icloud user id and passcode

If you forgot your Apple ID  - Apple Support

If you forgot your Apple ID password  - Apple Support

If you were the original purchaser and can prove it with

a receipt from Apple or Apple authorized iPad retailer showing

the serial number of the iPad, make a genius bar

reservation and bring in the receipt, iPad, and government

issued photo ID to Apple and they may assist in resolving the problem.

If the iPad was purchased used or there is no receipt, the AppleID and passcode must be recovered 

It is highly recommended that you make a Genius Bar Reservation to avoid delay at the Apple store

Genius Bar Reservation and Apple Support Options - Apple

There is no workaround for the security features of Activation Lock.

Here is a link to an Apple page about Activation Lock:

Activation Lock page: https://al-support.apple.com/#/getsupport