you could just hide the cube that you "follow", with the command hide object the_cube_your_camera_is_following,
as for moving the object,.
just use the move object commands, or look into newx/zvalue commands
and postion the camera at the objects position and rotateing it with the object.
some thing like:
position camera object position x(?),object position y(?),object position z(?)
rotate camera object angle x(?),object angle y(?),0
you might wanna rotate the camera independent on the object.
that way you could also easy add collision to the object that you are following, just use the built in commands(if you never tryed collision before)
does that help you?
edit: after answering you, i noticed that this question, or at least a question very simular to this one was posted right below this one. its called camera help plz(or something). try looking at that, by the looks off it, it explains wath you are trying to do.
Still a noob. easy comes easy goes