For toothbrushes I like medium bristles. The fine bristle ones wear out way too quick. For toothpaste I like Aquafresh. Not for any specific reason its just got three color stripes in it and it comes in that cool dispenser thing XD
My brother is a dentist. He's told me that the toothpastes that has whitener or abrasives can take the enamel off of your teeth with extended use. As for a toothbrush, I usually just get the ones that aren't overpriced
The best toothbrush on the market is the Sonic electric one. My dentist recommended it and he was sure right! They are expensive, but they save a lot of money at the dentist's office. I swear by them. I use Aquafresh, but Burt's Bees has one that doesn't leave your mouth stinging.