The Hindu Purana also states he will be born on the 12th day after the full moon of Hindu month Baisakhi, just a few years ago the end of Kali age. , According to John Mitchiner, the Kalki concept was likely borrowed "in some measure from similar Jewish, Christian, Zoroastrian and other religions". In this way, He got success in taking aim into the position of running, sitting, laying, walking etc. He wore to destroy only by using His spirit. After knowing the activities of Ashwatthama Lord Kalki selected him in His (Lord) armies to fight the battle.
He has a lot of divine weapons, a lot of missiles to destroy the whole world.
Kalki will know about himself fully in a war where heaven will help him to win the war. He has also been portrayed as someone that leads an army of warriors.
By the end of this Kali Yuga, the population of the Earth will be so much reduced to animalism that they will not be able to comprehend what is God or what is spirituality. He will eliminate all barbarians and robbers, end adharma, restart dharma, and save the good people. ", According to Cornelia Dimmitt, the "clear and tidy" systematization of Kalki and the remaining nine avatars of Vishnu is not found in any of the Maha-Puranas.  In other texts such as the sections 2.36 and 2.37 of the Vayu Purana, states Reimann, it is not Kalkin who ends the Kali Yuga, but a different character named Pramiti. The last Kalki is called "Cakrin" and is predicted to end the chaos and degeneration by assembling a large army to eradicate the "forces of Evil". It has also been predicted that this epic character of Kalki will restore righteousness & justice (Dharma) in the world. By the influence of this horse and parrot, the people of the world will know You as a learned scholar of all scriptures who is a master of the art of releasing arrows, and thus the conqueror of all. He is described in the Puranas as the avatar who rejuvenates existence by ending the darkest and destructive period to remove adharma and ushering in the Satya Yuga while riding a white horse with a fiery sword. He follows only the advice of Kripacharya.
If in Ashram Vishnu Yasa lives, Lord’s appearance in Kalki Avatar form was not possible because many people were there to live and it was the common place for the arrival of the people.
He would make the earth a peaceful place to live in.
It also describes the predominant signs of the times which become so dire and needful. Ramaa will be the second wife of Lord Kalki and they will have two sons.
Arjuna took it back but Ashwathama did not take it back because he had no knowledge how to take it back? But by walking all around the countries, he is engaged in destroying like fire.
 In these panels, states D Dennis Hudson, the story depicted is in terms of Kalki fighting and defeating asura Kali. His kinsmen, Gargya, Bhargya and Visala, etc., were very happy to hear the events narrated by Kalki.
, The Kalki avatar appears in the historic Sikh texts, most notably in Dasam Granth as Nihakalanki, a text that is traditionally attributed to Guru Gobind Singh.
, In some Hindu traditions, such as Vaishnavism, Kalki is considered to be an avatar of Vishnu. Moreover, the Kalki avatar has been mentioned in the great war epic Mahabharata.  The coverage of Kalki in these Hindu texts is scant, in contrast to the legends of Matsya, Kurma, Varaha, Vamana, Narasimha and Krishna, all of which are repeatedly and extensively described.
Bhagavan Kalki is supposed to take birth to end the Kali Yuga and start a new cycle with Satya Yuga. Being a child, He cannot travel the certain very long distance on foot (that was between the Sambhalgram & Mahender hill) without using divine power. Thus to control over him Kripacharya is doing his duty honestly.  The Chaubis Avatar (24 avatars) section mentions sage Matsyanra describing the appearance of Vishnu avatars to fight evil, greed, violence and ignorance.
, According to John Mitchiner, the Kalki concept was likely borrowed "in some measure from similar Jewish, Christian, Zoroastrian and other religions". When Sage Bhrigu returned and saw the horrific condition of his wife, he was totally broken. Vishnuyasa was thinking that Diptiman will give Him teaching but he did not do.
Ashwathama cannot die because the god Shiva offered him a gift of EVERLASTING LIFE (he cannot die) at the worshipping (at the TAPA) of his father Dronacharya.  He is described as a warrior in the Puranas. By cleaning the earth He has to establish Dharma and being fourth parth of Dharma, Satyayuga will start.
Let’s consider them one by one. I would also like to present You this sharp, strong sword and so please accept it.