When we buy a head texture, can we just upload an image from like...Google and it'll use the image as the head, and also can you change the head texture anytime or do you have to buy another head texture to do so?

gbleek, yes you can change the head texture as many times you want.
For those googled heads. You must download them to your computer and after that you can upload them as your head texture.

try making your own art and use that as a head.
you dont have to buy it several times, just once.

Thanks

Unless they are owned by someone else.
So instead of picking and stealing textures, try buying some from a texturer or try making some your own.