Automatic car won't reverse or drive when put into gear. on 2001 Honda Civic

While driving my automatic, it did not want to go into the next gear as speed increased. Later that night, it would start up but not reverse or drive when put into gears. It would only ease forward as if it were in neutral. I checked the transmission fluid and it was quite low, so I put about 4 quarts of fluid in it. Since it began not reversing or driving, the battery has been dying. What is your professional opinion as to what may be wrong with the car? How much will it cost to repair?

Asked by for the 2001 Honda Civic
sounds like the low fluid burnt up the clutches in the trans. you are going to need an overhaul. looking at 1800 to 2100 depending on hard parts.