It is not Islamic religion requirement for Muslims to wear galabiyas. It is cultural clothing for some countries.
The cap that Muslim men wear is called a turban. It is a type of wrapped head covering. Muslim men wear it as a religious symbol of their faith. Many Muslim men choose to wear green, because it represents paradise.
No, Muslim men are not required, per religion, to wear a kufi.
Yes they can.
its a culture
Men cannot wear gold jewelery, only women can. Doing it during Ramadan is even worst.
Qamees (Kameez) or Kurta
They can. It isn't haram, or forbidden.
Muslim men are allowed to accessorize, just like men of all religions do. But Muslim men are forbidden to wear Gold. But regardless of them desiring to wear rings, necklaces, bracelets etc... the only prohibition is that it must not be Gold. (To be clear it is yellow gold especially)
Per religion, there are no unified clothing styles or names for Muslim men clothing. However, There are requirements for Muslim men clothing that should be covered. Refer to question below for more information.
They can wear clothes of any culture as long as they are modest and clean.
Yes, although not favored.
The Islamic rule is that Muslim men should NOT dress like women and Muslim women should NOT dress like men. Accordingly, it depends on the country prevailing cultures on woman and men clothing and wearing but within the Islamic clothing rules. Another note to be mentioned is that the Muslim men are forbidden from wearing any gold at all cases. Refer to related question below for more information on what Muslim should wear.