How do I add a Qty box next to individual items?

Im trying to figure out how to add a quantity box next to each item. I want it to look something like this:
https://1381922849.3dcart.net/Choose-Your-Own–All-Out-Blow-Out-Sale_p_9.html

I want to create a product that is comprised of several small products. I want to list all the products possible for a customer to pick out which ones they want and how many of each product.

I have close to zero experience in the web design and coding area, any help would be greatly appreciated. Thanks!

Ryan