First, buy a toothbrush... then toothpaste. Use them regularly and your teeth should get back to their normal color... which is not really white. Anyone with "white" teeth most likely have had them bleached.... that is why they look so funny. If your teeth glow from a black light.... they are not normal.
crush up 1 average sized strawberry in a small cup, then add about half a tablespoon of baking soda, and mix it until it's a light pink paste, then using tooth brush brush you teeth with the pink paste and leave it there for about 3 minutes, then rinse with water, make sure you do not use the same tooth brush you would normally use, and only do this once a month