I grew up in Oakville (about half an hour's drive from Hamilton) and those look like the same toads we used to have in our garden (and I used to catch and play with). Those were American toads, bufo americanus. We had a big fat one who lived in the garden for several years, my mom even built a "toad abode" for it out of an old plant pot. It used to poop in our driveway.