its never to far gone if you have the $dollars$ to fix it up
youve just got sum up what need replacing,what doesnt and how much it will cost to get on the road.
from what i can see the tail gate will need replacing, the sills, looks the wheel arches would have alot of rust underneath.
if you know lot of people that could help you out e.g mates, body panelists, you could get it looking good