Welcome to the forum Eric. It's great to have you here now that we're back up and running.
You are also going to need a piece of granite to do your stamping and carving on. This will give you the solid backing that is needed for deep impressions. I, like a lot of other people here just stopped by a local granite countertop company and asked if I could rummage through thier scrap pile for a piece. They said no problem and showed me out back to where it was. After digging through the pile I found the perfect piece for my nneds and went back inside to pay for it. Both people refused adimantly to accept any money, saying it was just scrap and they throw it away anyways. I returned later with donuts (not the ones you find here) and they were very pleased.
As stated above by Twin, you are most likely better off having a look at the stamps and tools that are in the Tandy cataloque, and determine from there what you are looking at doing, then purchase a few tools to get you started. Once you have a good understanding of what you can and can't do, you will more able to determine what else you need.
Hope this helps, and looking forward to seeing your progress.
Ken