Questions about Torah (Commands)

Q1. I am confused by Paul’s writings in Romans. How can one reconcile the following verses: 
            “For not the hearers of the law [are] just before Yahweh, but the doers of the law shall be justified” (Rom. 2:13). Compare that with:
            “Therefore by the deeds of the law there shall be no flesh be justified in his sight: for by the law [is] the knowledge of sin. (Rom. 3:20)
            “Therefore we conclude that a man is justified by faith without the deeds of the law.” (Rom. 3:28)   >Answer<

Q2. Please explain Galatians 2:16: “Knowing that a man is not justified by the works of the law, but by the faith of Yahshua the Messiah, that we might be justified by the faith of Messiah, and not by the works of the law: for by the works of the law shall no flesh be justified.” (Gal. 2:16)    >Answer<

Q3. Please explains 1Corinthians 10:27. Does it mean the dietary laws are no longer necessary?   >Answer<

Q4. Do you believe in faith alone for salvation?    >Answer<

Q5. Why do you not teach obedience to all Yahweh’s laws (613 of them!), rather than just the Ten Commandments?   >Answer<

Q6. Once a gentile becomes a believer in Yahshua does he have to follow all the laws that Yahweh gave to Israel. If I read it correctly in the Old Testament the laws were given to the Jews only and not the gentiles. Do you think that gentile believers have to obey the sabbath and take Saturday to rest?    >Answer<

Q7. Please explain Leviticus 27 regarding the “Redemption of Vows.” Does it mean the priest was to place a monetary value on a man’s family and belongings? And for what purpose?    >Answer<

Q8. In Deut. 12:22, it states one could eat something considered unclean, if the blood was eliminated from it. Then in Chapter 14 it states “You shall not eat any abominable thing.”    >Answer<

Q9. Why did Yahweh suggest giving or selling to a stranger or alien, that thing which “dieth of itself,” but was forbidden as unclean to the Israelite? See Deut. 14:21.    >Answer<

Q10. Our Pastor taught us that a women during their menstruation period are to live in a separate housing unit apart from the house. I want to know your thoughts on how it should be worked out.    >Answer<

Q11. Is there a scriptural commandment to look for the new moon? If so, where is it found? Thank you.    >Answer<

Q12. Am I wrong to believe that the rite of physical circumcision was abrogated in the 1st century a.d.?    >Answer<