ouch - that was a nice bike frame but it is just that- and can be replaced. you will never get as good a replacement collar bone as the one you were born with, unless it is a Ti perhaps?
hopefully you got some witness as drivers tend to change their mind later on.
you have borken bones so although they will heal, they will be never be the same again and broken collar bone is prone to snapping more than an unborken one.
you've had a head injury - make sure you check yourself out. you can make your own claim agaisnt hte drivers insurance, if they refuse to play ball, take your case to a solicitgor, you should get value of your bike, loss of earnsing plus compenstaion for phycakl pain and discomfort - no idea how to put a value on that.