What age to brush teeth and what toothbrush and tooth paste to use?

Start brushing as soon as first teeth is out , you can use the finger brush at start and slowly after he has the dexterity of his hands can give him toddler tooth brush , tooth paste any non - fluoride containing please and only like a tiny smear on the brush.

Dr Brown (both toothbrush and toothpaste), 4.5mo onwards.