On the basis of seat belts, three passengers plus driver in the standard cab and four plus driver in the extended cab.
4 Passengers can legally fit in a Toyota Supra (MKII-MKIV).
One can purchase floor mats that would fit in a Toyota Tacoma by going to the Carid website. Also, AutoAnything and Amazon sell Toyota Tacoma floor mats too.
If both are 4X4 then yes.
Sadly, it will not.. they are different shapes.
No, it is too long.
No it will not fit perfectly.
No, the B4000 is a rebadged Ford Ranger.
2005 Toyota Tacoma