i bought a ipod from a goodwill, and it has activation lock. i have no idea what to do

You will not get this to work. Take it back to Goodwill and get a refund (or recycle it and consider it a contribution to Goodwill).

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

https://support.apple.com/en-us/HT201365

I have a ibod thoch. But I for get my password