Secondly can you let me know which product attributes are you referring to as only the ones in the documentation can be populated using the frontend form.
Unfortunately you won't be able to populate the product attributes through the frontend. As our documentation states "Some of these fields are available in Toolset forms out-of-the-box. This includes Product Name, Product Description, Product Short Description, Product Categories, Product Tags, and Product Image."
Product attributes will need to be populated through the backend or using a Tool that is specifically designed for creating WooCommerce products from the frontend.