IM having problems with my car idleing low than high and my car dying in park

I need help with my car. About a month ago my car wouldnt start at all untill I jumped it, than the next day I got a new battery and it worked fine for a day. Than the next couple of days my car started up but died when no gas was given at all than stalled when going 15mph or less and died at stop signs. Than I cleaned the throttle body, air filter, air intake sensor, added fuel treatment, changed the idle air control valve, and the fuel filter. Than my car ran good for about 2 days. Now the car starts and keeps running but idles really really low, and really high. When I try to put my car in reverse the car reves up really high and I have to step on the gas for the car to even barely move because the car does not move when I put it in reverse or drive. The car also dies when I first put it into reverse with no gas given and sometimes when I put it into drive and also when im at a redlight or stop sign it dies randomly. Please help