I have an old 4runner and with the rear seats down and a trailer hitch cargo rack and passenger seat forward I could comfortably haul 12 foot long lumber. In a pinch, I could haul 16 foot lumber. It would have been harder to do in a Tacoma because the back of the cab was fixed.
I also have a very old, long bed pickup that gets 10 miles a gallon. The only advantage it has is I can haul bulk goods but still a limited amount and plywood and sheet rock flat. It would probably make sense to sell the pickup and just pull a trailer behind the 4runner but there is a charm driving a truck with drum brakes and side window wings that is long gone and not coming back.
Cut the front off and make it a trailer.