Q] Were any more episodes of Zone made?
A] There are rumors that more may have been made, but as of 2012, nothing has come of this. As far as anyone knows, for now, the first episode of Transformers: Zone is the only one.
Q] Is the manga different from the anime?
A] There is a manga version of Zone, but it tells the same story as the episode. There are a few differences
Q] What are the story pages?
A] The story pages were published in TV Magazine. They continue and finish Transformers: Zone. For more information about them, including what happens in each one, check out the TF Wiki.