Quran Verse

jgnana wrote: Mohammed had received Quran from Allah, through Gabriel. Is this correct? When, where and how Gabriel received Quran? What is the position of Gabriel and why we are not like him/her now?

The Jews in Madinah at the time of Prophet Muhammad (saw) had posed the same question, they asked the Disbelievers of Makkah to go an ask him about the 'Ruh' or 'Holy Spirit', ask him (saw) to inform us about it.

To which Allah (swt) had revealed the following verse of the Quran in Surah Bani Israel (17:85):

And they ask you concerning the Ruh (the spirit). Say: "The Ruh (the spirit) is one of the things, the knowledge of which is only with my Lord and of knowledge, you (mankind) have been given only a little.'')

The Ruh means Soul, which has been blown in to each one of us, which keeps us alive.
The classical and contemporary commentators of the Quran say that Ruh could also refer to the Holy Spirit i.e. Gabriel (a.s) the Greatest Angel of all the Angels, who brought revelation. The answer to your question is visible in the shared Verse.

Why more than one commentary upon God's information? who gave certificate that this commentary is authentic? then i would like to know more about the philosophical difference between that

jgnana wrote: sir, what is Face of allah? allah has no form, then what is face? how many commentaries do you have? what is the exact translation?

We believe that on the Day of Judgment, we will see Allah's Face.  It is stated in the authentic hadiths:

"Narrated Abu Huraira: The people said, "O Allah's Apostle! Shall we see our Lord on the Day of Resurrection?" He replied, "Do you have any doubt in seeing the full moon on a clear (not cloudy) night?" They replied, "No, O Allah's Apostle!" He said, "Do you have any doubt in seeing the sun when there are no clouds?" They replied in the negative. He said, "You will see Allah (your Lord) in the same way." (Sahih Bukhair, Book 12, #770)

What do you mean by "how many commentaries" I have?  There are many commentaries, written by both classical and contemporary scholars.  Ibn Kathir's commentary is one of the most famous and well-known.

The translation is correct.  The term "wajhul-lahi" means "Face of Allah" or "Allah's Face".  Some translations have translated this term as "Presence of Allah" but the literal meaning is "Face of Allah".

jgnana wrote: What is the meaning of verse 2.115 2:115. கிழக்கும், மேற்கும் அல்லாஹ்வுக்கே (சொந்தம்); நீங்கள் எந்தப் பக்கம் திரும்பினாலும் அங்கே அல்லாஹ்வின் முகம் இருக்கிறது. நிச்சயமாக அல்லாஹ் விசாலமானவன்; எல்லாம் அறிந்தவன். And to Allah belongs the east and the west. So wherever you [might] turn, there is the Face of Allah . Indeed, Allah is all-Encompassing and Knowing.