For studio work I prefer working with seamless paper over other fabric or muslin backdrops. Other backdrops tend to wrinkle and collect bits of dirt and lint and are generally just hard do work with. With a roll of seamless paper you can unroll as much as you need and tear it off when it becomes dirty or wrinkled form use. I recommend you start with a Super White seamless paper from Savage. They have a large assortment of colors, but again I’d start with white or black and then move to other colors as needed.
I use a standard backdrop stand and slip my roll of seamless paper onto the cross bar of the stand. Pull out the length of paper you need and then clamp either side of the roll with a hand clamp. Make sure to get a stand that is wide enough to accommodate the width of the paper roll you choose to go with. A stand like this can also support fabric or other types of backdrops.
If you plan to do any video, you may also want a green muslin backdrop for chroma key.