Clothing for Men

Q: Is wearing flat caps (caps which are flat from back) an immitation of kuffar?

Q: Can men wear red or pink clothing?

Q: I have watched a YouTube video saying that the sunnah dress code for males is the dress code of the time. Is this correct? 

Q: Is it permissible to wear a tie?

Q: I heard that our pants/trousers/shalwaar/jeans/etc. should always be above the ankles. What if I normally follow this thing but when I go to work or college and because of what people will say, for sometime I dont follow it and once I feel they are not watching me I follow it again, is it a sin? 

Q: What kind of dress should a man wear? Is it permissible to wear t-shirt coat and shirt?

Q: Can men wear clothes made of artificial silk fabric?

Q: Is it sinful for a male to keep his fringe a little out while wearing a topi?

Q: Is it Sunnah for males to wear a kurta? Can men wear casual clothing or unisex clothing?

Q: Can I wwear a sherwani which has brocade work on it? (Brocade is a class of richly decorative shuttle-woven fabrics, often made in colored silks and with or without gold and silver threads).

I already purchased it and its hard to return. I asked the worker if it contains silk, he told me that it doesn't contain silk. Can I wear it on my nikaah?