Dear illustrious Team Leaders, I am returning to inform that the problem has been solved, though the sound played through my External BT enabled Loudspeakers is erratically chopped in between.
I shall have to arrange for means to improve sound quality of the played sound. Any suggestion in this regard would be welcome. The Last Mile tweak was outrageously simple: I just had to rename to file, like it was mentioned by Taron Saribekyan, BCM43142A0-0a5c-216c.hcd to bcm.hcd, then restarting the laptop. Now the BT package works as intended, every option activated. The solution has been posted to the Debian Forums, link: http://forums.debian.net/viewtopic.php?f=7&t=145792&p=718471 , also informed earlier. I thank you all, particularly, Dr./Mr. Haskett, Wright, Curt, Follmann and Joe, for staying with me till the end. Regards, Rajib Bandopadhyay Etc.