Question

why grandfather take toto to sharanpur and how

Answer 1

total does not let the other pets to sleep at night so grandpa decided in to carry to Sharanpur he carries Porto in a Canvas bag the ticket collector calls toto a dog because there was no separate rule for monkey

Answer 2

answer is here
Toto was a mischievous monkey. He kept disturbing all other animals in grandfather's private zoo. It seemed that only grandfather could manage him properly. So, he took Toto to Saharanpur in a bag . The ticket collector called Toto a dog and didn't qualify the category of human beings