A copyright is not a license to do business. You'll need to register with your state to collect sales tax, if you're going to sell retail. That's a business license.
A copyright is how you protect your original designs, so no one else can use them. Original artwork is automatically protected by copyright, but if you don't take the extra step to REGISTER the images, you won't collect much from an infringing party.
A trademark is what you'll want to get to protect your name, i.e.: Kleenex, Xerox, Nikon, Hallmark, etc. You'll need a lawyer for that.
A copyright is how you protect your original designs, so no one else can use them. Original artwork is automatically protected by copyright, but if you don't take the extra step to REGISTER the images, you won't collect much from an infringing party.
A trademark is what you'll want to get to protect your name, i.e.: Kleenex, Xerox, Nikon, Hallmark, etc. You'll need a lawyer for that.