Tools needed; 4 ft pry bar, sludge hammer, plumb bob, and a 2 inch socket. No, really now, just like someone said before, when removing the back bench, push down on the front of the seat and back with your knees, then lift up. MMG
In case it helps, here are a couple of pix of the anchors for the seats. The first in the one at the front of the lower seat, so you can picture how the seat frame needs to go back first and then up and forward. The second pic is the anchor in front of the package tray that hooks to the top part of the rear seat frame. Hope this helps! L8r
The rear seat back will drop down some due to gravity, etc... Shove your hands down in the nip and pull the seat back upward as much as possible. This provides space for the rear seat bottom to move back , then up out of the floor hooks.