This thread was meant for cataloging actual achievements in indian industry, not the usual x vs y contests, so please take those discussions elsewhere to another thread.
Responding to the parts of your post which are germane.
1. Can you give some better example or model for successful R and D by private or government sector?.
There are many models and products developed in Defence R&D by the govt sector. Look through this thread itself and there will be examples.
2. Inner content of automobiles.. Our metallurgy knowledge is so limited that, we don't even know how to extract Titanium and Zirconium in large scale despite of having large natural deposits.
Considerable work has gone on in extracting titanium and making it into a process. Hitherto however, the availability of metals and alloys from the commercial market or partners like Russia has meant that it was not a focus area.
Lets be clear here, India never aspired for great power status which focuses on militarisation and hence industrialization, so both a lower priority. Hence, many of these aspects were overlooked and not invested in. Even the OFB was only expanded post 1971, that is 24 years after independence. Defence, strategic issues, development of the private sector, license raj - all these issues went hand in hand when successive Govts placed socialist planning-welfare state politics as their central policy.
Which does not mean that now, steps are not being taken to address limitations as the strategic aspects become apparent - eg SAIL/DMRL steel replacing Russian steel for warship building and so forth.
6. Do you know what others call Brahmos as? a copy cat version of Yakhont missile. Now you tell what should I believe?
I see this a lot. X says this, y magazine says this.. ergo, concerns, worries.
Tell me something, you have access to the net, ergo the ability to search.
Those should tell you that Brahmos is a Yakhont derivative with Indian systems within as far as the missile is concerned. And when it comes to the system, Indian designed and developed FCS, C3I, storage and TEL (on local trucks if you want to nitpick the Tatra variants).
Today, the Brahmos is far more developed than the baseline Yakhont as well, since it comes in various flavors:
1. Ship, air and shore launched AShM; sub variant tested; multiple Blocks
2. Ship and land launched Ground strike; air variant in tests; multiple Blocks
3. Hypersonic version in development
Thing is as a product - Brahmos has seen far more development than Yakhont, which latter system simply does not exist in so many flavors and nor does it have any significant Indian content.
So don't bother about what others say.