What is the ruling of Sharia on bringing children to the Masjid?

What is the ruling of Sharia on loudly greeting those already sitting in the mosque? This is taking into consideration that they return the greeting and this could annoy the prayer performers.

Is it permissible to place the Minbar (Pulpit) to the left of the Mihrab (Prayer niche in the wall facing Mecca)?

Is the reward for praying inside Masjid al-Qibli (Al-Aqsa Mosque) and Al-Marwani Masjid equal to that of praying at the Masjid`s (Al-Aqsa) yards and under its trees?

From the perspective of Sharia, is Al-Aqsa Mosque considered a sanctuary? If not, does that reduce its religious significance?

"When (the people of the city) disputed of their case among themselves, they said: Build over them a building. {Al-Kahf, 21}. Does this verse refer to the permissibility of building mosques over graves, as is the case in several Muslim countries? And does Islamic Sharia approve of this?

Is it permissible to pray in mosques where there are shrines of the Prophet`s Family or the friends of Allah.