if you take the rear seats out now you have to deal with the frame. an x goes across the back of the seat for support since the first gens with out the rear werent made to not have the cross m ember. so you might need a littl ebit more time then just 5 mins
why is there no power. jumpstart it to get power then use the remote fob to pop the trunk. also if u cant go through the back seat its completly X off. otherwise u will have to jump the wires that go to the trunk release. Im not sure what color the wires r. i know the wires run under the carpet along the sill of the drivers side. If u can get the colors i would put voltage to it and maybe it will release the trunk. just a thought.
Because there isn't one, the whole saftey latch thing didn't come out until at least the 2nd gens.
If it's a a junk yard and the lock is gone you'll be able to just stick a screw driver in there and turn it. And honestly who knows if the power release is going to even work, the entire electrical system may be shot.