Dear Singh; now read carefully, point by point;

If a Muslim does not go to Mecca, he/she will NOT go to hell only for not visiting Mecca........!

Your second question is a great Mis-perception that even prevails in un-educated Muslims regarding exact meanings of Arabic Language. Scholar on comparative religions Dr. Zakir Naik www.irf.net has given a very detailed compresensive lecture on this issue which readily available in the Indian market....u may plz check  These are actually mis-interpretted words.

Muslims wear turbans becz this was done regularly by last Prophet of Allah as per their customs in Arab at that time and true muslims try to follow even his clothing patterns............... and remember those who does not wear turban dont get out of Islam............! 

This is the divine duty of every Muslim to show the right path to those who seek and it is wrong that one will go to hell if could not convert a non-muslim to Muslim.

Halaal meat is that meat whcih is cut only in the name of Allah. Cut of halaal animals in the name of idols was done before the revealation of Islam and that was forbidden afterwards.

Prophet Muhammad PBUH was illiterate of world and it was kept intentionally by ALLAH so that Kuffar could not pretend that this Book is written by Muhammad PBUH himself, therefore whatever he got from revealation from ALLAH He used to write through his companions and full Quran was save in the heart of Prophet who used to listen from various Qaris to confirm its correctness and whole Quran is since then read and listened by all the Muslims every year in the month of Ramadhan............!

There is no difference between Sunni and Shia, both are equal Muslims the only difference is of opinion. Sometimes Prophet PBUH used to perform an action like Prayer and other rituals in slighly different way, therefore some Muslims are following one way and others are following other way............Both are doing the same things............Anyways non-Muslims has alwasy tried to divide Muslims through this cheap channel............!

(May Allah forgive me for any deviation)