Hi & welcome to MRF,
Your locomotives, having being stored for some time would benefit from a service before use. It's likely that any lunbricants have dried up. Have a look through previous posts about service/lubrication, but whatever you do (IMHO) steer clear of WD40, 3 in 1 & electrolube.
Sorry I can't help with the other questions though - enjoy the hobby & the forum.
Your locomotives, having being stored for some time would benefit from a service before use. It's likely that any lunbricants have dried up. Have a look through previous posts about service/lubrication, but whatever you do (IMHO) steer clear of WD40, 3 in 1 & electrolube.
Sorry I can't help with the other questions though - enjoy the hobby & the forum.