We shot these on a Pentax 645z and either the 28-45mm or the 75mm (the interrogation one). The last shot is pretty wide - 28mm on that camera is around 22m in 35mm terms. That said, you could have shot them on anything - it's a calendar so the print size is pretty small and we weren't cropping that much. That camera does have killer high ISO performance (the night shot is at 1600, which is crazy high for us), but I don't know how much that matters in the grand scheme of things. The fact that it's very waterproof was useful.
For post - they are all composites. Interrogation was the most involved - the dogs couldn't be in the room at the same time, and that room didn't have a mirror on the wall (we velcro'd one on, then took the frame of the mirror from a shot of an internal window in another room). The light wasn't there, and we had to shoot each dog twice (one for the room, the other for the reflection) to get that much depth of field, so getting them into roughly the same position for two shots was tough.
That last shot was pretty simple - we set up lights then dragged the shutter for the ambient. Shooting the dog took less than three minutes, but he had been practicing wearing the glasses. We used a different plate for the cars going past, but the dog and car are the same shot. The reflection in the glasses is dropped in, otherwise we would have been seen in them.
Even the coffee shop is a composite - the dog can't be near a donut without eating it, and the ceiling / sign is way higher than that in reality, so we bought that down a few feet to fit the aspect ratio of the calendar - we really wanted the "Donuts and Coffee" sign in there since that's part of the gag.