If its in the shed, you shouldn't have any serious problems. Check the engine oil and trans-hydraulic fluid of course. I'd drain the fuel tank and fuel lines and replace the fuel filter. Put in new fresh fuel and bleed it out.
I can't think of anything that you would ruin if its been inside out of the weather, other than you might have some seals that dried out and will now leak. You'll find that out soon enough when you start it up and run it for awhile. Sometimes tires will dry rot if they sit around long enough.