Because those Toyota pic up trucks are used behind the front lines as a light utility vehicle not on front lines, as main jeep the army uses the Land Rover Defender 110
, it is protected by bullet proof glass , B6 level protection body ( works against High power rifles ) , Run flat tyres and blast protection of floor against 3 kgs of TNT. They are pretty good for now . The army will soon also likely begin induction of the Interceptor
As for Frontier Corps they also uses the Muhafiz armored personnel carrier in large numbers , Toyota isn't used in fighting
As police the Toyota pic up trucks are good enough for a law enforcement, they aren't fighting a was , for heavy duty they also have APCs