Both Autoboss V30 and Launch Master x431 will serve your purpose. However you could cover older Toyota models which came with 17 pin port with it's self diagnostic feature and other Toyota models by using a low cost OBD II PC interface which will cost you below Rs.7,000-.
You could cover Conzult I Nissan cars which came with 14 pin connector by using a PC interface which will cost you around Rs.5,000-. You will miss only Nissans came after year 1998 or so. Equipments which support Nissan are well over Rs.200,000- price mark as of it's Proprietary Consult protocol.
-GMI