engine quit, and doesn't turn over

What is your question?

Engine was running rough, like not running on all cylinders. Quit on highway, after letting off accelerator. Alternator checks out good, battery hasd 2 cells bad, and has been replaced but can't get more than a click when we turn key... put breaker bar on crankshaft, bolt turned, crank did not, pulley cup did not. Dead engine, starter, or what??? Help!!!