From the movies we know that Transformers can
It also seems that they can
This is "proved" by Ironhide's phrase in the beginning of the "Revenge of the Fallen", when he refers to a Decepticon
He is here, I smell him.
Also when Autobots first meet Sam, Ratchet mentions that Sam has high level of hormones, which, I suppose, he "sniffed".
It is also clear that they can
Do they have any other ways of getting information about the outer world? Do they, as super-advanced machines, have any detectors or radars? I am quite sure they do, because they drive somehow, while their eyes are somewhere deep under the hood.
I have only watched Michael "Logical Plot" Bay movies.