What rocks are used for landscaping?

It depends on your landscaping, are they pavers or step stones? Pavers need a fairly solid level base for walk ways or even driveways, dig down about one foot, lay down a semipermeable heavy construction cloth, about 6" of pea stone 2" coarse sand, use a vibrating compactor and level the sand, place the pavers, cover with a thin layer of fine sand and sweep with a coarse broom to fill gaps. Occasionally you may need to lift a paver to shovel a bit more sand under it to keep them level.

for step stones just remove enough soil to set each stone, individually.

Others may do it differently.