I have products I want to show but not sell in my online store, how to I tell customers they need to call?

You can set products you want to show in your online store but not actually sell on your website by enabling that option in your system settings. Once you are logged into the system as an administrator, in the blue bar, click on the gear-shaped button on the far right and go to Settings > Website Settings > Products and you'll see the option for No Online Purchase Message not far from the bottom of the list. Set it to On, choose the message you want from the drop-list, and then scroll to the bottom of the page and click Save. When a product is at 0 inventory and if it's not set to Unlimited Inventory, that message will display. Once the product has inventory again, the message will no longer appear.