13
As many as you want, if they are small enough!
12
There would be an infinite number of rectangles possible
15
4 times
None of them.
OMR technology
Depends what you are drawing on.
Rectangles are all drawn the same(2 sides long, 2 sides shorter that the long pair). Therefore, they are all parallelograms.
If drawn on a flat plane (paper, for instance), then yes, they are a 2D shape.
A square by definition has lines of symmetry. Therefore a square cannot be drawn without any lines of symmetry.
A square can be drawn with four lines.