Jorn, are those pictures the car in question? Just from those angles, it isn't a DIY project, unless you are a bodyman.
Did the guy who hit you have insurance? Are you concerned it will be totalled? (it might very well be)
If he does, and you are, bring the car to an idependant bodyshop, and have them write up a sheet. Explain that you are trying to save the car. If it's close, they can typically work it out with the insurance company to write the sheet to just below the total value.
If he does not, still bring it to a shop where they can tell you if it's a lost cause.
For example, is the frame comprmised, and how long to pull it out. How bad is that right qtr? I see it is pulled in from the rear body panel getting squashed. What about the floor in the trunk? How is that rear body panel (which will need replacing) attached? Some are overlapped and welded in a manner that eliminates getting used, and takes quite a bit of time to weld in a new one.
So, if you want it fixed right, you need to get a professional opinion from someone who can physically see the car.

If you don't want it fixed properly. Just beat it out with a hammer until you can bolt on some new taillights, and so the trunk works.

__________________
On some nights I still believe that a car with the fuel gauge on empty can run about fifty more miles if you have the right music very loud on the radio. - HST

1983 300SD - 305000
1984 Toyota Landcruiser - 190000
1994 GMC Jimmy - 203000

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