Quick question, do the back of these have the adhesive on them?

Yes, the Gold Foil for Laser is backed with a permanent adhesive.

One other question. Are we able to emboss/stamp a design on these on our own?

Our Gold Foil for Laser is intended to be printed with a laser printer but some customers have successfully used this material with embossing stamps. If you'd like to try samples of this material for testing with your application, you can visit the link below to request a few sheets at no cost. https://www.onlinelabels.com/samples