What drama! An auto parts store will sell a cheap pump just for gear
oil--you can use it to draw the fluid out as well, and change it if you want to. To fill, fill until it starts to drip from the fill hole and you're done. Next time you have the trans out if you look, most toploaders have a boss (unmachined) on the bottom for a drainplug. You can drill and tap a hole if you want a drain, but after doing so be sure to clean the case very well before re-assembly. The pumps are nice because they usually come with about 1-2 feet of hose, which means that the gear
oil container doesn't have to be under or in the car, which will lessen the chances of a stinking mess.