BIG problems
 

my 89 supra turbo is going through some big problems:
1. when i stop at a light or stop sign and start advancing slowly my car starts bucking.
2.my radiator coolant tank was completely empty yet theres no signs of it leaking anywhere.
3.my engine oil tank was also completely empty and there were no warning lights what so ever i had to put two full pints to start seeing oil on my dipstick.

please help me i have no idea whats going on with my car diagnostics anyone ?

Does your guy have any smoke at all? Have you considered changing the head gasket? Remember to take the head to a shop to be checked and lastly stop driving him.
FYI the Supra of this years is famous for blowing head gaskets and there is tons of material written on this forum.