What code ?
For the code I talked about in my previous message, I already indicated where to put it:
If you want to add text to the main product code display, you need to add it in the file "show_default" of the view "product" via the menu Display->Views.
Are you talking about something else ? Please explain more.
You're missing characteristics and Custom fields.
Characteristics are there so that the user can choose something.
In order to add attributes to products, you want to create a custom field of the table "product" via the menu Display->Custom fields. That will allow you to attribute information to products, and you will be able to attribute several values to a product if you use a multiple dropdown or checkboxes and them you will be able to display the information on the product page and potentially create filters on these custom fields.