I hope you have bigger plans for yourself then making yards with your degree in turf grass.
Before you get out take some business classes to include marketing. A few short clues: Make sure that there is a need for the service where your at. With the housing market crash, not much of that going on here anyway, back in the day it was a great gig. You will need at least a skid steer/CTL or small tractor, Harley rake/Preparator, tiller or scarifier, and likely some kind of dump tailer or dump body on pickup. Then a trailer and tow vehicle. Of course insurance, operating capital, and a line of credit helps. None of the above needs to be new, but it still is a good bit of money.