Help i think my engine locked!!!!!!1?

I have a 97 cad. deville and smoke was coming from the engine, the oil light came on i poured it in drove about a mile the dash told me to stop the engine oil pressure was low and the car just stopped,when i tryed to start it up ikicked a little had a litlle bit of "rev"in the engine but it didnt turn over did the engine lock?? And what would it be doing if it did? what does that sound like to you???