Gas tank?I see damage to gas tank and likely suspension parts... It's a 50/50 if you ask me. Like others said... Depends on what the current value of the car is (in not damaged condition) and if the repairs will be a large percentage of that repair. Also other factors... If it was not your fault you could be entitled to deminiahed value on top of repairs could push it over the edge of total loss.
Nothing in the 90s relates to modern collision repair.Not pretty but repairable. I've seen a lot worse repaired when I worked at a GM dealer in the 90's.