How would I go about adding filters for an online store? What I mean by this is something similar to Bodybuilding.com's online store; you choose something like products by such and such brand, for weight loss, and under $50. The website then shows you products that fill all of these requirements. If you decide you don't care about the brand, then you can x out that filter and it only shows you products that fill the two remaining filters. As you can probably tell, I'm pretty new to all of this, so a relatively easy to understand answer would be greatly appreciated xD Thanks in advance!
I would suggest using WordPress and WooCommerce (by WooThemes) plugin for this. Both are free and WooCommerce does exactly what you want (and more).
Hope this helps :-)