Not bad.
I imagine for a noob who's new to 3d, I gotta say you're doing pretty well. But this was pretty random. Make a movie or game or something!
As for a critique--
The transformer looked ugly. All the peices kept pushing into eachother. Watch out for that. The geometry on everything was basic, but maybe you wanted that. The moving camera didn't flow very well when you used it-- kind of annoying to watch as it swung around randomly. As for the objects that moved, the tank and the city was cool at the end, but all the things you were trying to make move like a human didn't move right. Try...maybe slowing them down and putting some secondary motion into those if possible.
Sorry if I sound a bit harsh, but trust me-- it's the only way you'll learn! Keep at it and you'll be a pro in no time. Good job(s).