Common Tranny Leak Spots?

Took a look today, and I found a threaded hole on the front part of the tranny (torque converter cover part?) with nothing in it! This seems a little strange, here is a picture. Had her jacked up and forgot to look at the dipstick connection (doh!) but there is a lot of nasty stuff all around the transmission so my suspicion is it has a lot of leaks. It drips in spots from the front all the way to the mount in the back I am considering going to a tranny shop and asking them to pull it and replace all the gaskets and seals they can find.

Mystery threaded hole:


Gunk buildup on drivers side front of tranny pan (line did not seem split):


Another threaded hole (drivers side rear just above tranny pan) but does not go into transmission that I can tell.