Replace fan with light fixture

Hi All, I recently bought a house built in the 50's that has several low voltage light switches that look like this: [ATTACH]62713[/ATTACH] [url]https://www.dropbox.com/s/ap8a8lptoq...0_HDR.jpg?dl=0[/url] I cannot turn off one of the hallway lights and a couple of outdoor flood light. An electrician came out and told me the transformer is bad and wants $400 to fix the lights or rewire for $1800. Replacing the transformer seems easy so I'm going to attempt to do it myself. The electrician did not come across as trustworthy so here I am hoping to get a second opinion from the wisdom of the crowd My questions: 1) Do you think he is right that the replacing the transformer would fix the issue? 2) Is this the transformer? [ATTACH]62714[/ATTACH] [url]https://www.dropbox.com/s/fj80vd90ti...9_HDR.jpg?dl=0[/url] Any suggestions are welcome. Thanks! Johnny

Would like to flip a switch from outside the door so the light is on when I enter. Anything that can do this, sort of like a doorbell, without wiring a switch and running it to the outside?