Glad you're okay matey, that's the main thing. As a minimum you should always get the driver name and the car reg. Any photos?
Did they get your details?
Best (and correct) thing to do is to ring your insurer and give them the details, let them deal with it. Depending on the damage they've got, which you may not be able to see fully, it's very likely it'll cost you far less in the long run to go via insurance, plus if they start claiming whiplash then you're covered. You know I've just been there with a crash, honest mate it's really just easier to let them handle it even if you don't claim for your own repairs.