traditional or classical wedding is called Orthodox wedding
Yes
Yes
Generally speaking, you can only be married in one, not both, otherwise you are getting married twice. Many people choose to marry in an Eastern Orthodox Church, and then perhaps have a blessing ceremony in a catholic church. The reason for this is because an Orthodox Wedding is accepted by all catholics, but a catholic wedding is not always accepted by all Orthodox bishops. An Orthodox wedding is accepted as valid by both. Answer2 A catholic wedding is not a valid wedding according to the Orthodox church (official position). Either you or your fiance have to be an Orthodox Christian to get married in an Orthodox church. Typically an Orthodox Priest will want both parties to come to pre-marital counseling and all the particulars of an Orthodox wedding and marriage will be discussed so that everyone is prepared. A famous example of this is when Grand Duchess Elizabeth who was at the time of her marriage Princess Elizabeth of Hesse Germany and a Lutheran married Grand Duke Sergei Alexandrovich of Russia. She later voluntarily converted to Orthodoxy (there is never any compulsion to convert).
Good question! You'll have to ask about that.
A Greek Orthodox person may attend a wedding 40 days after the death of a parent. Though some do not wish to party, and are mourning, they are allowed to go to weddings and parties.
Yes. They specialize in styles that meet ALL laws of modesty.
it merried in orthodox country(for example in Russia),or mounting,or widows
Generally, the answer is no, if the marriage is going to take place in a church. An Orthodox Christian is responsible for raising the children, if any, in the Orthodox Faith, even in cases of mixed marriages, so a non-religious person may not be comfortable with that. However, there are exceptions, and it may be best to check with your local Eastern Orthodox priest or bishop about any specific requirements they may have.
good luck
Assuming no divorce has taken place, which would require an annulment, yes, if you have changed from Orthodox to Catholic it would be possible to renew your wedding vows in a Catholic Church. There would be no need for a full blown wedding, however, as the Catholic Church does accept the sacraments of the Orthodox Church as valid.
Yes, if that person is going to baptize any children you may have in the future, since a child's godparent must be Orthodox, but the matron of honor does not have to be Orthodox if she is not going to baptize any children
Yes and no. Orthodox Jews follow ALL Jewish wedding traditions while Reform Jews make their own decisions.