https://www.youtube.com/watch?v=ZDEgwGG7bY0 for video/preview of the train I'm intending for
basic exterior, interior if possible, preferably with doors that support that addon where you can open doors by clicking them, preferably seating/standing positions too. If the train could be a giant vehicle (3 coaches, all in the same mesh) that would be great.
tl;dr - make a TFL London Underground Central Line train with 3 coaches.