It might depend on why it was parked up in the first place ?
It'll need fuel, air, and a spark to work ...
Previous owner had trouble starting the engine and kept trying until the starter stopped making a noise.
Seems to have have damaged the starter ? ( loud clicking noise coming from the starter.)
I’ve not got diesel in it at the moment , will have to go get some from town. Wasn’t expecting to get this far in a day.
I’ve given it a wack with a piece of wood but still nothing.
After cleaning earth wires and connections to the battery my electrics seem to be working in places.
And you must have good earths, to the engine, gearbox and body back to the battery ...