Allah is the highest. He is high above ALL of His creation. He is ascended upon a Throne, which is greater than the heavens, and the Earth. Much much much greater than the heavens and the earth. So much greater that the heavens and the earth could fit in the footstool of the throne, and they would be like a ring thrown into an open desert. Allah is certainly the greatest.

No Allah is perfect. He is not like any of His creation. He has told us that He has Hands, Eyes, a Face, and Foot. But all of these attributes are befitting to His might and Glory. 

A Muslim does not say a single thing about Allah other than what Allah says about Himself. We don't say He is like a clover, He got tired, He is Jealous!

Allah is Perfect, and Unique.

It means to believe in Allah in total perfection, and uniqueness.

It means to believe in His prophets cause they are His, and He sent them. We cannot pick and choose. A Muslim must believe in all the prophets of Allah.

It means to believe in the Angles! We must love them all, we cannot hate an Angel say, for example, to hate Michael who is charged with rain, and the vegetation of the Earth, or Gabriel who is charged with revelation (brings down the scriptures to the prophets).

It means to believe in Allah's predestination of good, and bad (relative to us, but to Allah everything Allah does is good).

It means to believe in the last day: The day of Judgment.

Only Allah knows.

Plenty, plenty, plenty. Many have already occurred.

To name a few,

Objects will begin to talk.

There will be much killing. The killer won't know why he killed, and the guy that was killed won't know why he was killed.

The Antichrist will come.

Prophet Jesus son of Mary will return.

Gog and Magog will be set free.

The sun will rise from the west (after this one there can be no more repentance)

Allah only accepts Islam. He says in the Quran: "Whoever seeks a religion other than Islam it won't be accepted of him, and he will be one of the losers in the hereafter". I would rather lose anywhere, but not lose in the hereafter. This is because Hellfire is eternal. It never ends, and we never die when we go there, if we go there.

Allah is the most just. Don't even think that we can be nicer than Allah. Allah is the Most Just, and He said in the Quran "We were not to punish till having sent a warner". The "We" here is the majestic we used in Arabic. So if a person never heard about Islam, and was never warned clearly Allah would have a special test for that person that He knows is equal to the chance that person would have had on earth.

It is the only religion that:

1- Hold Allah as One, Unique, and Perfect.

2- A lonly worship of Allah, not Jesus, not an idol, and not an angel only Allah.

3- The Quran does not contain contradictions.

4- The Quran contains scientific facts, which are 1300 years ahead of their time. The Quran while revealed 1400 years ago contains scientific facts, which are only now being discovered. It is not in contradiction to science.

5- Allah challenges the world to produce the like of the Quran. And He says they won't be able to.

6- Prophet Mohammed was the most influential man in History. Even a non-Muslim wrote a book called the 100 most influential men in History, and Prophet Mohammed was #1. Prophet Jesus was #3. Note even Prophet Jesus was a prophet sent by Allah. Would Allah allow a false prophet to be so successful? No. Even the Bible says this in Deuteronomy 18:19. A false prophet would die!!! Yet Prophet Mohammed did not die till he completely conveyed, and taught Allah's religion.

7- He had many prophecies, and all of his prophecies have come true, or are still coming true.

Yes anyone can. There are two declarations, which are necessary:

1- To bear witness that no one deserves to be worship except Allah

2- To bear witness that Prophet Mohammed is the Messenger of Allah.

This makes a person Muslim. But it should be said in Arabic. Next a person takes a shower, and He/She is a Muslim.

After a person becomes Muslim he/she is taught about Prayers, Fasting, Zakat, Hajj, and Sawm. These are pillars of Islam.