Allah is One indeed. He has absolutely no partner. He alone is worthy of being worshipped. He is all Independent and depends on none. All the worlds and creatures are subservient to Him.
We believe in all Apostles and Prophets whom Allah Almighty sent for the guidance of humanity. It is obligatory upon every believer to respect and revere all Apostles and consider them as Allahs1 ‘loved ones'. Our kind lord and master Hazrat Mohammed (may the choicest blessings & peace of Allah be upon him) is the leader and highest of all the Apostles and Prophets.
Allah, the Almighty has revealed books to some Apostles, which are called "Kalaam Allah" (speech of Allah). To have faith and belief in all the revealed books and in their contents is essential. Of all the revealed books, the Glorious Qur'an which was gifted to our Beloved Prophet (Hazrat) Mohammed is the best and Allah Almighty Himself has taken up the responsibility of its protection.
Angels are the creatures of Allah, whom he has created from light. They are neither male nor female. They are innocent and obedient servants of Allah. They only do or perform what Allah commands them. They subsist on the worship and remembrance of Allah.
Genies have been created of fire. They live and die like human beings. There are believers, disbelievers, the good and the bad in them. Disbelieving and mischievous genies are called devils.
One day everything (angels, mountains, animals, the earth, the sky) will perish like human beings. There will remain nothing in existence but Allah alone. Then all things will be re-created and the dead ones will be resurrected from their graves. All will be made to gather in a particular field that is called "Mahshar". The Balance will be installed and deeds of each one will be weighed in it. Everyone will get the punishment of his/her misdeeds & sins and the reward of their own virtuous acts. Believers will be admitted into paradise while infidels (kaafir) and disbelievers will be cast into Hell.
Hell has a bridge over it that leads to heaven. It is called "Pool Siraat" (the path). It is thinner than a hair and sharper than a sword. All people will have to cross this "Siraat". It is the one and only one pathway to reach heaven.
Whatever had to happen in the world and whatever one had to do - Allah Almighty wrote all of that with His eternally infinite knowledge. And whatever has been decreed will certainly happen without the slightest change. This is called "Taqdeer" (predestination).