Seems to me from the pictures that you are looking at some internal parts as well as external and frame, depending on how fast the guy hit you.
$6k to me doesn't seem too much, I mean it's a lot, but not for what you need doing. If all else fails, do the internal, the frame and the light you are missing and leave the front bodywork until you have the money. Provided the law allows, IDK anything about US vehicle laws so that's up to someone else to tell you.