Answer 1
No, they are not at war. Iran and Pakistan are Muslim brother countries. Many of the Shiites are living in Pakistan and many other Muslim countries. The basic beliefs of both the sects are the same. Why should they be at war?
Answer 2
The question is posed makes an implicit assumption about the nature of Middle Eastern conflict which is incorrect. There is not a war between all Sunnis or a group representing all Sunnis and Shiites or a group representing all Shiites. Struggles between Sunnis and Shiites, which have sometimes broken out into actual war (such as the Lebanese Civil War) are localized national conflicts. People divide along religious lines for no other reason than that it works as a good ethnic-identifier. This is no different than the Catholic-Protestant conflict in Ireland or the Jugoslav Wars between Catholic Croats, Orthodox Serbs, and Muslim Bosniaks.
There are more Sunni Muslims than Shiite Muslims. Shiite Muslims represent about 15% of the global Islamic community whereas Sunni Muslims represent 85%. The numbers of the other sects are negligible.
Sunnis
Extremists come from both the Sunni and Shiite camp, but compose a minority in each.
The people of Lebnon have different religions like CHristian, Islam,.. and Muslims there are both shia and sunni. but Hezbollah in Lebanon are shiite Muslims.
No. They are almost all Sunni Muslims.
Shi'ite Muslims worship in Mosques as do Sunni Muslims.
They are not enemies. Refer to question below.
Between 70% to 80% of Muslims in Kuwait belong to the Sunni and 20-30% are Shi'as.
Sunni Muslims as well as Shiite Muslim beliefs are the same as all Muslim beliefs. Refer to related question below for Muslim beliefs.
The Ottomans were Sunni Muslims, and the Safavids were Shiite Muslims.
Yes the Muslims there are 70% shia and 30% sunni
Sunni and Shiite, with Sunnis being the majority of 85% of all Muslims.