Pinky your lo is such a cutie in that photo!
Tooth brushing is a battle for us. I put the toothpaste on and she licks it straight off then clamps her jaws round the brush while I waggle it around the general toothy area hoping for the best before she takes it off me and has a good chew! How long we spend depends on imogen's and my patience levels on any one day.
Today we had a different approach which was quite fun- she brushed my front teeth a couple of seconds then I steered her hand while we did hers a bit, then she did mine, then we did hers etc, then she poked me in the eye with it and I thought Game Over!