after leaving it that time as said I’d still expect the noise to clear especially after a good run batt will be flat if not been charged brakes could be jammed if handbrake left on but should release with some gentle revs, tyres will need checking and I’d check all the fluids 2, but should release with some gentle revs , and cant really see any major issues with the gearbox standing for that period as long as it wasn’t temperamental and the oil is good
but as I’ve learned cars do tend to surprise you though , hope you get it sorted though mate oh and this is what it says on the lifters on Wikipedia
the valve train will rattle loudly on start-up due to oil draining from the lifters when the vehicle is parked for long periods. This is not considered significant provided the noise disappears within a couple of minutes, typically it usually only lasts a second or two. A rattle that does not go away can indicate a blocked oil feed or that one or more of the lifters has collapsed due to wear and is no longer opening its valve fully
Chris