It does say something about praying to Mary... it says DON'T PRAY TO THE DEAD.

Concepts come before the words. Isn't that always the case?

I am not Catholic but Purgatory is in the Bible Jesus and his brother James used the Jewish name for Purgatory, Gehinnom.

Mary intercedes at the Wedding Feast at Cana in Galilee and gets Jesus to perform His first public miracle, even though His time had not yet come. She can obtain graces for us faster than we could ourselves and in greater abundance, not to mention that she can obtain for graces Jesus would not grant us without her help and motherly intercession.

Well, I'll answer those questions as soon as you answer this one: Where does the Bible say we have to find all our beliefs in the Bible? In fact, where does the Bible even mention the Bible?? Nowhere, because Jesus Christ founded His Church and promised it the fullness of God's truth three and a half centuries before that Church decided to gather some of its writings into a book. The Bible is a product of the Church. The Church and its teaching are not products of the Bible. And they Church Jesus founded would be teaching the fullness of God's truth today even if it had never decided to produce such a book.

Purgatory and praying to Mary is not in the Bible.  They are both Catholic beliefs.   

Oh, but it is:

2 Maccabees 12:43-46- "And making a gathering, he sent twelve thousand drachms of silver to Jerusalem for sacrifice to be offered for the sins of the dead, thinking well and religiously concerning the resurrection, 

44 (For if he had not hoped that they that were slain should rise again, it would have seemed superfluous and vain to pray for the dead,)

45 And because he considered that they who had fallen asleep with godliness, had great grace laid up for them.

46 It is therefore a holy and wholesome thought to pray for the dead, that they may be loosed from sins."

Matthew 12:32- "And whosoever shall speak a word against the Son of man, it shall be forgiven him: but he that shall speak against the Holy Ghost, it shall not be forgiven him, neither in this world, nor in the world to come."

 1 Corinthians 3:11-15- "For other foundation no man can lay, but that which is laid; which is Christ Jesus. Now if any man build upon this foundation, gold, silver, precious stones, wood, hay stubble: Every man's work shall be manifest; for the day of the Lord shall declare it, because it shall be revealed in fire; and the fire shall try every man's work, of what sort it is. If any man's work abide, which he hath built thereupon, he shall receive a reward. If any man's work burn, he shall suffer loss: but he himself shall be saved, yet so as by fire."

Sure, the word "purgatory" isn't there, but the idea certainly is described. Just like how the word "trinity" or "Bible" is not in the Bible.

Because nobody wrote about it. It's the Bible, not the Koran. 

Jehovah is a God of love, so he would never torment his people forever in a fiery hell (1 John 4:8). For more information, please visit jw.org.

The same reason Hell is, one of them made it up.