✔ 最佳答案
You're responsible for the damage from the first collision, where you rear ended the vehicle in front of you. The vehicle that rear-ended you, however, is responsible for that collision.
If you're found liable for loss or damage and don't have insurance (or enough insurance) to cover all the costs, then yes you have to pay it off yourself. People buy insurance so they don't have to take that risk themselves. If you didn't buy insurance, you accepted that responsibility personally.