Hi, If you are not happy with the colour of your teeth, you can go do a dental procedure called Teeth Whitening, this changes the innate colour of your teeth. Results usually last for 2-4years. You can use any soft bristle tooth brush (preferably non electronic ) and any toothpaste you like , to improve the health of your teeth you must floss twice a day and use a mouthwash. Flossing is as important as brushing.. I hope I have cleared your queries. Do write back Incase you have anymore questions