Here is a list with all the Polaroids in New York :)

New York 2-12: on the wooden pallet
New York 3-12: next to the pallet and the concrete pipes
New York 4-12: on the right side of the yellow taxi
New York 6-12: behind the "bottle" icon. you can click on the icon to pick it up, no need to move up there
New York 7-12: on the platform in front of the "COSMO" grafitti
New York 9-12: on the right, next to the burning barrel
New York 11-12: between the trains
New York 12-12: you need to move to the other side of the level. the Polaroid is under the green "Dondi" grafitti