Inquiries about the license of the cosmetic product design series

Hello, we’re a startup that makes new cosmetics.
We are planning to sell 3 products under the concept of antibacterial.It is a series of spray, body wash, and lip balm, and one of the poster graphic products from envato market will be used on labels and boxes as the main graphic elements.
It’s a product with the same concept, so we’re going to sell a total of 3 products like the series format.
We will use the same graphics for the uniformity of the series.
For sales, they are single items, not set configurations. In this case, do I have to purchase 3 of the same item with the same extension license?
Also, can I use the typography font on the envato poster graphic as a Name of the product?

I’d appreciate it if you could answer.