I am bad about remembering but we "started" when he got his first. Really he just wants to chew on and play with the toothbrush, but it is getting him used to it.
Yep, you should start brushing them with either a toddler soft bristled brush or one of those little finger pads they make for babies/toddlers. No toothpaste, just water.
Re: Brushing teeth
Proud Mama to cleft cutie