Marble Track can be made from the Bridge Set and the Elevator from Mechanical Engineering.
Each ramp can be thought of as the hypotenuse of a right triangle.
The two legs are the distance the uprights are apart
and the difference between the connecting point of the high end and the low end of the ramp.
http://www.marshall.edu/LEGO/lessonplans/MarbleTrack/FindingLEGOAlmostRightTriangle.htm
A one to one gearing is not fast enough.
A lever keeps the marble until the elevator lowers.
Elevator can also be made from the Simple Motorized Machine set.