To add packages in your tours just login as a supplier or admin to your website and navigate to tours backend listing page
from blow screenshot you can view after adding any of your tour you can simply click on packages and then add your packages to system for any particular tour package.
as you can see in below image the available options for tour packages
once you added your tour packages for each tour it suppose to look as below
every tour can contain multiple packages based on dates travelers count and pricing and once packages submitted your site will be able to show these packages as below.