Hello,I Just registered.I would like to know where i should begin.I just got my old train out that has been put away for the 30 years.I wanted to get it  running for my grandson.It ran good 30 years ago.Track was rusty,so I took quite a bit of time to clean it.Then i hooked up transformer.Nothing?Where do i  begin troubleshooting,track? transformer? locomotive?I did not pull the pins and clean the other end.Also what gauge wire should i be using to connect transformer to track?I would have bet after i cleaned track,the train would run fine.