I am an orthodox Christian, ask me a question!

[Jon Paul]

There is no need to pray to the saints for intercession,that is what Christ came for.

As I've already said, Christ did not just come for mere intercession. That is not the orthodox/Nicene viewpoint. He came as God incarnate, the union between man and God, to give us the spiritual restitution of human nature through his joining of humanity and divinity, repairing the damage and divinising and sanctifying those who would follow him as Lord.

In fact, his whole mission was to restore sinful mankind back into the graces of God the father

His mission was not that of a mere man; but that of both God and Man, joining the two natures and repairing the fallen human nature and thus becoming the New Adam, the New Creation, more perfectly human than anyone with a fallen human nature, which he repairs and divinises through grace.

There is no need for so called purification after death and no need for this transitory state called purgatory.According to the scriptures Christ did all of that with his death on the cross.

That is not "according to scriptures". You are just repeating your indoctrinated American Protestant viewpoint. I have already provided extensive and exhaustive scriptural evidence for a purifying state in the afterlife which is neither finally heaven nor hell.

Another thing is that if God the father,Christ the son,and the Holy spirit were all God then who was Christ praying to,himself?

The Father is not the Son, so no, he is not praying to himself. Christ, as God incarnate being fully human, would of course pray to God, his God, God the Father.