BC-Axeman

I had a '92 4runner V6 that we put +250k miles on. It never went more than 40k without needing a major repair. We have a Rav4 now that has never needed anything but maintenance at 45k now. I have owned a bunch of Toys and never had one without reliability issues. I have worked on more Toyotas than any other brand. Only because there are so many around.
That said, I think all machines will have failure modes and there is a difference between a sensor or fuel injector going bad and something like using a too small bearing or inferior gaskets. Most manufactures have come to similar conclusions when engineering advances in their designs. Things like through-the-block head bolts and better water paths to prevent blown head gaskets. Fuel delivery is seldom a problem any more. Engines stay leak tight longer. Diagnostics tell you when something is going wrong before it becomes a disaster.
I have had both Ford and Toyota, luxury and base models, and have liked and disliked things about both. I would go with whatever dealer you are most comfortable with. If it were to be a work truck and be used hard I think I would go with the Ford by just a little.
Most of the diesel problems are caused by federally mandated designs, like EGR. EGR on a diesel! Talk about asking for trouble. Diesel exhaust being fed back into the intake. Even the newer ones are loaded down with lots of complex trouble causing devices and it will get worse in the coming years.