Sayyed Mohammad Al-Musawi

If you have no way at all to know the owner, you give the item or its value in Sadaqa on behalf of the owner and pray for him.

Wassalam.

We can not confirm any children or family belonging directly to Imam Al-Mahdi (AS).

Mehdavi is a surname used by some person in Iran but they are related to Imam Al-Mahdi (AS).

Wassalam.

Your Ghusl is valid because wiping off your body and massage on the scalp is not obligatory during Ghusl.

Wassalam.

Provided that Hijab is fully observed, wearing stylish clothing is allowed if it does not attract non Mahram men. Applying any make up and going out where non Mahram men can see you, is not permissible.

Wassalam.

Khums is obligatory on everything you lawfully own, on the date of your Khums, if it is not in use for your day to day life requirements. There is Khums on items you have purchased and started using like jewelry, clothes, car, house where you live, etc.

Wassalam.

Not true at all.

Masjid Al-Aqua existed before the rule of Bani Omayyah and we have in our authentic books authentic Hadeeths from the Prophet Muhammad (SAWA) and Ahlul Bayt (AS) about the great reward of praying in Msdjid Al-Aqsa. ( Kitab al-Mahaasin by Al-Burqi, Kitab al-Faqeeh by Al-Sadouq, Thawab al-A;mahal by Al-Sadouq, al-Orwatul Wothqa by Sayyed Kadhim Al-Yazdi , Kitab Al-Mabsoot by Al-Shaikh Al-Tusi, Kitab Al-Nawaadir by Al-Rawandi, Minhaj Al-Saliheen by Ayatullah Sistani, Tahrir al-Qaseelah by Ayatullah Khomeini and many other books.

Bani Omayyah tried to divert Muslims from Makkah to Masjid Al-Aqsa during their conflict with Abdullah ibn Al-Zubair who was the ruler of Makkah for nine years.  Praying in Masjis Al-Aqsa is highly recommended but we should never do any act which can be taken by people as a support for the occupiers of Masjid Al-Aqsa.

Wassalam.

Music used usually by the sinners in their gatherings is sinful.

Wassalam.

If you could ask about your religious responsibilities and rules but you ignored to learn,you then need to repeat every Prayer and fasting done with out proper purity from Janabah.
If you had no way at all to ask or learn your religious responsibilities, then you do not need to repeat.

This 

Wassalam.

Islamic rules can never be irrelevant in any time or place. Islamic rules apply every where and every time according to its conditions  and the circumstances. Polygamy has its own conditions for those who need it. Western monogamy is just a claim when their own studies confirm that most of them have illegitimate affairs during marriage while Islam is frank and clear in dealing with matters by organizing a system to protect people from sinful sexual behaviour.

Wassalam.

Exposing the Zeenat if the Muslim female in front of of Nin Mahram men is not allowed according Quranic verse:    ولا يُبدينَ زينَتَهُنّ إلا 

Zeenat is any beautification made by the person or any artificial beautification.

Wassalam.

Yes, touching the name of God in any language with out Wudhu must be avoided.

Wassalam.

Identifying the enemies of Allah (SWT) is based on their conflict with the message of Allah, His Prophets and Ahlul Bayt (AS) who are the real successors of the Prophet Muhammad (SAWA).

The practices which are done by them and known by people as part of the life of the enemies of Allah (SWT) must be avoided.

Wassalam.