Solution:

The second one as he has no white spot on his forehead.

Solution:

The bus doesn't have side mirrors and windshield wipers.

Solution:

The first burger as its has fewer sesame seeds.

Solution:

When you are using roman numerals.

Solution:

The watch on the left is a toy. The minute arm is too long, so it can't pass around the face when it moves.

Solution:

The clock has the letter B instead of the number 8.

Solution:

The girl in the red shirt.
As she is eating a sandwich that looks like it's years old, and that might kill her.

Solution:

The first one is as she is wearing the badge of a man.

Solution:

The woman is not wearing a necklace.

Solution:

The blazer from man3 is on the boss's chair. So he is the boss.