Code P0123 is for Throttle sensor/switch.. My car won't start. No warnings

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Starting fine, running great, all of a sudden wouldnt start. Got code P0123 and have tried so many things, thought it was the plug that goes to the sensor but now feeling it isn't. Got engine to turn over by using starter fluid but ofcourse wont stay running, engine isn't getting it's own gas. I'm single Mom, out of work and can't afford to have a garage fix it. Please help with some ideas.. I've been told chances are slim that the sensor itself went bad so what else could it be? I read something about a switch on the gas petal but found nothing there. I've reset the computer and tried the fuse trick too still nothing. Engine turns over, starter is working just not getting gas.