I bought this train set 8 years ago when my grandson was born.  Since then it has been stored.  For his 8th birthday I sent the set to him in Utah.  My daughter said the controller is not there, nor the tracks.  I found the tracks, I don't see the junction track.  I have twelve curved tracks and eight straight tracks. I need to know what controller to order, also how to identify which tracks I need. 

Thanks for the help!