Motor Oil

I recently added some motor oil to my 1994 Isuzu Rodeo. After I added the oil the car started smoking and sending out tons of white smoke from the exhaust pipe. Obviously this isn't good. The car then acts like it is going to cut off. Any suggestions on what I should do? Should I change all the oil? Thank you in advance.

white smoke means it is burning water and most likely mean the head gasket blew and antifreeze is getting into the oil. Have it fixed soon or you will trash the engine

Did it not smoke at all before you added the oil? Are you sure you didn't over fill it?
G/luck
Joel