Minimum Requirements For Salvation
[5:69] Surely, those who believe, those who are Jewish, the converts, and the Christians; any of them who (1) believe in GOD and (2) believe in the Last Day, and (3) lead a righteous life, have nothing to fear, nor will they grieve.
Unity of All Submitters
[2:62] Surely, those who believe, those who are Jewish, the Christians, and the converts; anyone who  (1) believes in GOD, and (2) believes in the Last Day, and (3) leads a righteous life, will receive their recompense from their Lord. They have nothing to fear, nor will they grieve.
 
INTRODUCTION
“While every religion has been corrupted by innovations, traditions, and false, idolatrous doctrines, there may be "Submitters" within every religion. There may be Submitters who are Christian, Jewish, Muslim, Hindu, Buddhist, or anything else. These Submitters, collectively, constitute the only religion acceptable to God. As emphasized by the theme on the front page of this book, all Submitters who are devoted to God ALONE, and do not set up any idols beside God, are redeemed into God's eternal kingdom (2:62). A criterion of the true submitters is that they will find nothing objectionable in the Quran.” 
All Believers Constitute the One Acceptable Religion
As expected from the Creator's final message, one of the prominent themes in the Quran is the call for unity among all believers, and the repeated prohibition of making any distinction among God's messengers. If the object of worship is one and the same, there will be absolute unity among all believers. It is the human factor, i.e., devotion and prejudice to such powerless humans as Jesus, Muhammad, and the saints that causes division, hatred, and bitter wars among the misguided believers. A guided believer is devoted to God ALONE, and rejoices in seeing any other believer who is devoted to God ALONE, regardless of the name such a believer calls his or her religion.
Surely, those who believe, those who are Jewish, the Christians, and the converts; anyone who (1) believes in God, (2) believes in the Last Day, and (3) leads a righteous life, will receive their recompense from their Lord; they have nothing to fear, nor will they grieve. [2:62, 5:69]
So does this mean that we don’t need to do our Salat, pay our Zakat, give to charity, believe in any of God’s messengers or scriptures, or angles?  
Minimum Requirement is this minimum to all people or does it vary from person to person?
I am going to argue that the minimum will vary from person to person
We know that Zakat is 2.5% of our income, but this does not mean everyone will give the same amount. For instance the person who makes more money will pay more than the person who makes less money. Both are meeting the requirement, but to look at what each person’s level of Zakat is will not be the right metric to determine if they are meeting the requirement, and I believe that the minimum requirement will operate in the same manner 
If you do not know about the Quran you are not responsible for following it.
If you do not know of God’s messengers you are not responsible for following them
God holds us responsible for what we know and our circumstances 
Greater Miracles Bring Greater Responsibility*
[5:114] Said Jesus, the son of Mary, "Our god, our Lord, send down to us a feast from the sky. Let it bring plenty for each and every one of us, and a sign from You. Provide for us; You are the best Provider." [5:115] GOD said, "I am sending it down. Anyone among you who disbelieves after this, I will punish him as I never punished anyone else."*
*5:114-115 The Quran's overwhelming miracle (Appendix 1) is described in 74:35 as "One of the greatest miracles," and brings with it an uncommonly great responsibility. 
Miracles Bring Greater Responsibility*
[2:211] Ask the Children of Israel how many profound miracles have we shown them! For those who disregard the blessings bestowed upon them by GOD, GOD is most strict in retribution.
*2:211 The Quran's mathe