Thanks for your helpful reply. When you state ' it is direct and no standing in queue'...do you mean to say that there is a separate window for First class tickets for the local? And there are few/ no people for this queue?
My initial question is directed at finding out - whether I have to come onto er to the Ticket Counter ( normally at the entrance of the station) , buy the ticket and then get onto the train...is there an alternate - such as ticket booth on the platform itself?