* Automatic: Capacity will vary depending on whether it's a 4R70W, E4OD, or another type. You'll find anywhere from 10-14 quarts (including the torque converter). Checking the owner's manual is crucial.
* Manual: Manual transmissions generally hold significantly less fluid. You would need to consult the owner's manual or a repair manual specific to your Bronco's transmission for the exact amount.
You absolutely must consult your owner's manual to determine the correct capacity for *your specific* 1993 Ford Bronco. The manual will specify the transmission type and the correct fluid capacity. Failing to use the correct amount can severely damage your transmission.