gift product

[galeinai]

Hi
I want to give a digital gift (mp3 and pdf) for some people that sign to my newsletter.
I made a product with those items.
I made a shopper group for those who signed.
1. How can connect between the product and the group?
2. how can make this product a gift? (in the shop i can see it when i'm signing as a shopper from the group but i can't "buy" it beacuse there is no price)
3. Is there a way to send these shoppers a mail from VM so they can download the files.

Thanks! Imry
VM 3.0.10  Joomla 3.4.5