It won't let me add pictures in guessing there is a minimum post requirement?

I'll start by saying I am completely clueless to most of this.  I've had several model trains as a kid and have one HO now that really only sees daylight around Christmas.  I love the hobby just don't have much time.  Anyway to my question.

My dad had a Lionel 239 set.  I'll include pictures.  I'm 36 and it has never run in my lifetime.  His best guess is that the last time it ran was the early 70s.  I had it repaired at Draude's Derailment in Lebanon, PA. 

I can't seem to get it running.  The original power pack or whatever it's called doesn't work.  I'm using one of two that powered a Disney Lionel set from the early 90s.  It seems like it wants to go but just not getting enough power.  The track isn't great, but the other ones I have run ok on it.  I'm not sure if the weight of the metal locomotive is weighing it down.  I also noticed the old/original power pack says AC only whereas the one from the 90s has AC and DC terminals.  The locomotive itself doesn't say anything.  I'll include a picture.  I know it's not the matching tender.

It's almost like I need more power to get it going.