What do the terms Prerunner SR5 and TRD off-road mean on a 2000 Tacoma?

PreRunner SR5 = Type of Package of Vehicle whether it is the Tacoma or 4Runner SUV TRD OffRoad Pkg = similar to the 4 wheel drive truck where all 4 wheels are engaged for offroad. only difference is for the TRD OffRoad Pkg is that just the front driver and rear passenger tires are engaged.