How can I find my password for my TC?
I cannot remember my password for my TC - how can I find it and/or reset it?
MacBook Pro, Mac OS X (10.6.8)
If you mean your wifi password, you'll need to Soft Reset the TC to remove the password, and then set it up again.
Resetting an AirPort base station FAQ - Apple Support
https://support.apple.com/en-us/HT201945
Under what circumstances will I need to do a reset?
Soft reset: Perform this reset if you have forgotten your password. A soft reset resets your password and disables security settings (Access Control and RADIUS settings are temporarily interrupted). Forgetting the password would normally prevent you from connecting to or configuring the device. If you make no changes within five minutes of doing a soft reset, the device will revert back to its former state. All of the device's settings will be available after it has restarted.