The 4 cylinder refers to the engine, which has 4 cylinders, it has nothing to do with the cab configuration.
EnolaGaia pretty much summed up the rest I think.
As for being a rediculus question, there is no such thing on this forum, please feel free to ask us about anything you need help with.
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Silver 03 Taco Limited TRD 4dr. 4X4 V6 Auto
Extang Tonneau, LineX Liner, 3" Toytec lift with front diff drop, rear Alcan, AAL's w/ degree shims, Procomp shocks front and rear, Locker mod, 285/75/16 Nitto's, Code alarm/remote start CA670, Putco Stainless Grill, Several CUSTOM off road pin stripes