1989 BMW 750Li V12 Automatic 150,00 miles
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i parked car for 6 months was running fine came now to drive wont start dash first said oil temp sensor see owners manual now when turn over says that and oil pressure sensor will these not make run wants to fire off but cant

The oil pressure switch can not keep it from starting. Neither will the oil level sender. Is there oil in it? Is there fuel in it? And is it good fuel and is it being injected into the engine? Is there spark? That power train can be diagnosed with the BMW proprietary software and the faults (if any) read out, but lets start with the basics, check for spark and fuel and let us know what you find.