Hi Jlapey,
Usually pinching the top of the
plant will cause branching which will make it bushier. And they will end up looking even better than what you find at the store. At least the stores around here. Yes you can use the leaves that you prune.
In the case of my Basil which is a lovely bush now after a year. It was about 6 months before I was able to harvest enough to make it count before that I was basically just pinching off the ends of branches to make them split so the bush would be very full.