God is the Creator of Everything!!! So why did he create Lucifer? Even though Lucifer was created to worship God. Did not God know that Lucifer would turn against him

Rev. 19:6, "…Alleluia! For the Lord God Omnipotent reigns!" Yes, our Father is omnipotent, all powerful, all seeing.

But, He is a Father, not a robot-builder. His creation was given the power of choice, along with all other powers and privileges attached to their level of being. Not only was man given the freedom to choose right and wrong,(Deuteronomy 30:19, "I call heaven and earth to record this day against you, that I have set before you life and cursing: therefore choose life, that both thou and thy seed may live.")but so were the angelic beings.

Ezekiel 28:15 tells us why Lucifer made his choice. "You were perfect in your ways from the day you were created, till iniquity was found in you." Vs. 17 "Your heart was lifted up because of your beauty. You corrupted your wisdom for the sake of you splendor."  Isa. 14 elaborates on Lucifer's pride, verses 12-21, but I will only cite 12-14, "How you are fallen from Heaven O Lucifer, son of the morning! How you are cut down to the ground, You who weakened the nations! For you have said in your heart: I will ascend into heaven, I will exalt my throne above the stars of God; I will also sit on the mount of the congregation on the farthest sides of the north: I will ascend above the heights of the clouds, I will be like the Most High:"

We see the motivation, so why did God create him in the first place? Because Lucifer could have decided NOT made that choice. Lucifer was a beautiful and beloved child of the Father. When we have children, sometimes we can see ahead that they will make bad choices. As free moral agents, we cannot stop them, although we can make efforts to educated them along the way. Not until they have crossed an ultimate line, do we become estranged from them.  

God could have created us all without the ability to choose our course. But then what would love mean? He wanted a universal family of loving, righteous beings and has provided a plan for its accomplishment.

Had Lucifer not sinned, there is no way to conclude that someone in the human or angelic races may not have made such a choice at some time.

We hope this is of some help to you.

Was Adam the first man?

Yes, Adam was the first man. Genesis 2:7,8, "And the LORD God formed man (the Hebrew word is Adam) of the dust of the ground, and breathed into his nostrils the breath of life; and man became a living soul. And the LORD God planted a garden eastward in Eden; and there he put the man whom he had formed." 

Adam was a special creation because he was created in God's image. Genesis 1:26, "And God said, Let us make man in our image, after our likeness: and let them have dominion over the fish of the sea, and over the fowl of the air, and over the cattle, and over all the earth, and over every creeping thing that creepeth upon the earth." Adam did not look like God. He was like His wonderful Creator in that he could reason, be just, love, and exercise benevolent authority. God made man in His character likeness and put him in charge of managing the earth.

Who are those beings that the God Father talked to when He created humans?

In Genesis 1:27, God said “Let us make man in our image…” God was talking to the Logos (Jesus’ name before he became a human) and the angelic family. God is the great architect of His plan and He used the Logos and the angels to help carry out the work of the natural creation. “…there is but one God, the Father, of whom (as the architect) are all things, and we in him; and one Lord Jesus Christ, by whom (as the instrumentality of creation) are all things, and we by him.” 1 Corinthians 8:6 (KJV). 

The Gospel of John also supports that the Word (Logos in Greek) directed the creation of all things. “In the beginning was the Word, and the Word was with God; the Word also was a god. The same was in the beginning with God. All things were made through him; and without him was not anything made that hath been made.” John 1:1-3 (RVIC)  

The angels were created before the natural universe and they helped the Logos with the creative work. When God spoke with Job, we receive more insight into the angels’ status and their great joy in the creative process. “Where were you when I laid the foundations of the earth? Tell Me, if you have understanding.

 Who determined its measurements? Surely you know! Or who stretched the line upon it? To what were its foundations fastened? Or who laid its cornerstone, When the morning stars sang together, And all the sons of God shouted for joy?” Job 38:4-7 (NKJV) The sons of God were all the angels. (They could not have been man because man had not been created.) 

The concept of “our image” does not refer to a body image. It refers to a character image. God is all loving, all just, all wise, and all powerful. Man was created with love and justice written in his heart. Romans 2:14, 15, “Gentiles…by nature do the things in the law…who show the work of the law written in their hearts…” Man was also given intelligence (developing into wisdom) and power or dominion over the animals and plants. He was given management of the earth.