I should let you know that the TTC streetcar bell is not right. I have a pritty realistick imitation of the bell that is a single peddle on the vehicle itself. I would make it so that the bell is done using B as always. And yes the flexity outlook does have a horn. It sounds like a car horn I think. You might want to look at that.
And also, I don't know weather you got it or not, but I wanted to know how to get the vehicle editor.