To create a listing on Trade Me using Trade Runner you simply need to map the product to a Trade Me category. 

How to map a product to a Trade Me category

On the Dashboard, under the Need a category to list in click fix now.  This will take you to the mapping screens so you can category map your products for Trade Me.

You can map products individually, or map an entire category of products from your store. 

More Information on Category Mapping

For more information on how to map products see Category Mapping.