Can I get a train from chongqing railway station to visit Ciqikou?

Oh, it's not necessart for you to take a train.
Just take Light railway line 1 at Lianglukou Station, then get off at Ciqikou Station. Then walk to the scenic area.
Well, the distance between these two places is about 8.4 miles. And it will take around 20-25 mins on the way.
So you have enough time to fully appreciate the beautiful scenery of this old town.

Hope helpful. :)