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Level lawn and turn around, post holes

Firstly, I have a 100 square metre lawn that is not very level. I'd like it levelled, requiring up to 15cm skimmed off the top. Also I'm building a retaining wall and would like around 15 holes (poss 200mm diameter?) in depths from 500 to 900mm. Then there is about 2 - 3 cubic metres of soil to move around 10 metres to level another part of my section. Finally I have a metalled turn-around that has slumped and needs levelling - around 10 square metres up to 20cm deep. I hope that someone with a Bobcat or similar could do the whole lot pretty quickly?????