Sub licensing on graphics

Hi, im a new envato subscriber and I was trying to fully understand license requirements on a couple of things. First, anytime I use an image(s) as part of a greater design for a client, I must provide a sub license to them? Is that the same if I use a font or add-on filter to edit photos as well? secondly, am I able to create a design using either fonts, add-ons, and or images from envato and sell them as digital downloads on sites like etsy? These would be resold over and over. Is that allowed? Thank you for your help