Well, the procedure is straightforward. You have to go to the Administration Block and the Transcripts Office on the top floor.
You need to submit an application that explains why you require transcripts and lists all required credentials. Furthermore, you must pay a fee that is determined by the number of transcripts you require. Three sets of them used to cost 7000 INR each (one set comprised eight transcripts, one for each semester of B.tech), a few years back.
You can pay the fee and receive a token slip from the accounting department. The token must then be submitted to the Administration Block office. They'll most likely tell you to wait a week, but if you're lucky, you'll get them sooner.