Yes. A cone will roll following a circular path with the central axis being the point of intersection of the sides of the cone (which is the point of a pointed cone).
both
I think both
yes it has a flat bottom surface and one vertice
A cone.
The square based pyramid does not stack or roll.
A pyramid will not roll and you cannot stack objects on top.
cone
yes it can
no
Yes. A cone will roll following a circular path with the central axis being the point of intersection of the sides of the cone (which is the point of a pointed cone).
both
A cylinder
yes
No
you are a cone
Cone