I have the first gen Taco. So far, no problems in 14 years and 221,000 miles. Mine is in with the group of Tacos that had the frame rust issue. Yet mine is still mint, perhaps because I've only lived in places that don't get snow. But lately I've seen a number of people make comments about the newer Tacos with serious rust forming on the frames just sitting on the lots. That has me just a hair concerned. I've even seen one or two posts where the frames on 3 year old Tacos are already rotted through. That and the other scads of little problems with rear springs, tailgates, and radios. Never thought I'd even think about this, but I'm not 100% sure I'd go with a newer Taco given these issues.
But... I suspect there's a few out there that have put some serious miles on their 2nd gen tacos with no issues. Just putting a feeler out there.