Car will start but dies at about 1000 rpm's. Sometimes though if you rev the car up to hi rpm's it will run just fine even at low idle until you turn the car off and start it again. Then you have to go thru the hole thing of reving it on high to keep it running at low idle.
Sounds like the battery might have been disconnected or run dead recently. If so, the Engine Computer lost its memory and has to relearn "minimum throttle" before it will know when it must be in control of idle speed. It also might not give you the normal "idle flare-up" to 1500 rpm when you start the engine. To meet the conditions for the relearn to take place, drive at highway speed with the engine warmed up, then coast for at least seven seconds without touching the brake or gas pedals.