Magento is a large system to fully comprehend, I would recommend studying their tutorials, you need to be looking into your theme templates for product display:
Have a look at the fields already displaying there and look into the Class documentation for the specific fields you want.
I have found working with Magento to be quite time consuming (my lack of experience there), especially when looking for fields and changing the default layouts.
You will have to dive in here
Unfortunatelly there is no descriptive texts to help, but you will be able to see the structures.