In this situation I would suggest using an Alternate Layout. Once the content is final, choose Create Alternate Layout from the Pages panel menu. Make sure to create the new layout the same size and orientation as the original and then use the Numbering and Section Options dialog to specify the numbering required for the second catalog. The Print dialog will then let you select which layout to print.
In this video we're going to look at starting your page numbering, not from 1, you can see, we started A, B, C, D, and 1 actually starts on page 5. That means we can have a Contents page, and a Cover that don't get included in the page number. That's going to help us with a couple of things, like our Contents page. Otherwise our first bit of text is going to start on page 5. That's not true, it's on 1. It's kind of true. Anyway, let's go and look at setting out our page numbers.