Materials What clay should I use for this?.....

It is often possible to mix in a bit of acrylic paint into paper clay to tint it. That might be an otion?

 

I wouldn't use LaDoll for a doll that's meant to be the final version, personally. It's a nice clay to work with and it's not -super- weak, but it's not a really durable material. Its surface can be painted, though, and probably should be as it's pretty porous and kinda "grainy" until you sand, paint, sand, paint, etc. to get it nice and smooth. If it's a doll that's mostly just going to sit and not be taken places, moved much, etc., then it might be okay, but I would go with something more durable like Apoxie Sculpt. It's about the closest you can get to "sculptable resin". It comes in white, peachy pink, dark brown, dark red, etc., so you can blend the colours if you want - or just paint it after.