copy all itunes podcasts to ipod classic

Hello,

Please refer to the following Apple Support document.

Sync your iPhone, iPad, or iPod using your computer - Apple Support

Hello,

Correct, connect your iPod to your computer and select "Podcasts" to synchronize. If you do not see Podcasts as a synchronization option then it could be that your iPod classic does not support Podcasts.

What is your iPod's exact model number?