Full-Quoter Slick wrote:

A Verticutter is ...

If you want to Aerate Lawn ...

Which I don't.

A scarifier can be a ...

The 3 above machines are all entirely different and
individual machines , No one machine can perform all
the 3 tasks.

I'm not looking for a machine that Aerates.

I'm looking for an out-door, gasoline-powered vacuum cleaner that can
vacuum sand, gravel and small stones from paves surfaces, and then
(perhaps by changing a part or two) will dislodge and vaccum up anything
not nailed down on my lawn (leaving only grass) and then (perhaps by
changing a part or two) will vacuum up, pulverize and turn to dust
leaves in the fall.