Seconding @cebit absolutely.
No point in trying to game the system. The ways we learn in India/Pakistan to game the system (dau number/jugaaR) is going to create a lot of problems for you here in Germany. You want to get an admission in a German university, come here, find an internship and go straight for a work permit once you find a job. As far as I know, once you enter Germany on a student visa (16), you are not allowed to transition to a work permit (18) or a blue card without finishing the degree. A friend of mine couldn't find a job after her Masters here and so enrolled in a second Masters to stay in Germany. She got an offer 4 months after enrolling in the second Masters and wanted a Blue card. The Ausländerbehörde told her to go back and finish her second degree first.
If you research the procedure to get a Blue Card you will notice they always ask to see a degree. Now here you want to put up the degree you got in your country. The next document they will want to check will be your current visa which will be a student visa signifying you came to Germany to study. You see the problem? It will be immediately obvious that you tried to avoid the job search visa by entering on a student visa. You will have wasted a study place in the university, you will have abused the Studentenwerk system and you will have taken advantage of a student semester bus ticket. German civil servants don't look kindly on third world foreigners trying to be too smart by half. Believe me, they see stuff like this every day from all nationalities and are smarter than the average desibaba when it comes to German law
Please read this carefully:
http://service.berlin.de/dienstleistung/324659/pdf/en/
Having a foreign degree and a Blue Card does not exempt you from Labour Ministry check. However it wouldn't strictly be Vorrangprüfung but a check whether you are earning at least 46.4k euro a year, or, at least 36.192k a year for IT/engineering or other shortage professions, AND the work conditions (hours/salary) are equivalent for a German employee.
In other words, it is still a kind of Vorrangprüfung to protect the German labor market. The only way out of it is to finish the degree you enter in for.