I have now successfully made two of the legs and feet (with toes.) For these, I used the same piece of clay to make the leg and foot and then cut out the toes. This was quite difficult at first and I didn't think this method would work either, but I had some practice making the toes and feet together. By making a foot that spread out to how far the toes would go, I could then cut out with a knife the toe shapes. Obviously they were quite a strange rectangular shape each, but I managed to shape them with my hands to look more like toes.
I textured these (the legs, feet and toes) by pressing hessian cloth around them, a different method to the one I had used to texture the body, to add some element of variety. I tested various different cloths on a rolled out piece of clay beforehand and decided that hessian made the best and most lizard-like impression that complemented the texture that I'd already given the body.