I want to be able to mow my lawn

[MarkP]

If you lay cinder stuff will grow in it and as grass clippings accumulate it will become more soil-like. If you can have a truck spread the cinder that would be helpful but if you set a mower at highest setting and just start mowing, picking out the rocks that stick up the highest and filling the lowest spots with cinder, you will eventually be able to mow normally.