BMW 323 Engine Runs Rough

Hello, My Car Listed Above (323i) Has Been Sitting For Over A Year. It Was Running Smooth Before I Put It Down. Now When I Went To Drive It...

When I Start The Car Smoke Pours Out Of The Exhaust And From Under The Car? I Can Only Assume That Oil Is Burning Somewhere In The Car....

Engine Performance Problem 1996 Bmw 323 6 Cyl Two Wheel Drive Automatic Engine Running Rough,like Spark Problem