Car would not start. Rough Idle,Accelerator Pedal no pressure

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Car parked in Garage found dead in the morning,Jumped it starts,Accelerator spongy never engages shows no pressure. Idles quietly until change to each gear, Idle becomes rough car acts like it wants shut off. Same thing each time. How it runs is beyond me. Lights work,radio works,air and Heat work hoses no cracks,full tank, liquids full. Noticed little water from one of tail pipes when I let it sit and run. Car has about 60,000 miles,never cutoff, looks brand new , nobody but wife drives but it is a 1997. She drove it just before we found it dead in the garage which was the next day. Accelerator pedal never change no pressure