Thor

Thor is the Norse god of Thunder, strength, power, oak trees and protector of humanity. He weilds the hammer Mjolnir. His height is six foot six. See Thor's Stolen Hammer.

Mjolnir
Mjolnir was made by the dwarfs Sindri and Brokkr. It's capable of levelling mountains. To see the legend and creation/story of Mjolnir, see Skaldskaparmal.

Marvel's Mjolnir

In Marvel Comics, Mjolnir is made out of a dwarf star and is capable of teleportation and ripping the reality fabric of Marvel universe.

"Whoever holds this hammer, if he be worthy enough, shall possess the power of... THOR!"

Marvel's Thor
Marvel: Thor has blonde hair, he was the son of the elder god Gaea and Odin, his half brother was Loki, his "stepmom" was Frigga, he wasn't married to Sif but had a daughter called Torunn, he shows all his affection to a Midgardian called Jane Foster.

Norse Mythology: He has red hair, he could only fly on his chariot, his hammer could only be returned to him when he wears special gloves, he needs to wear a special belt for Mjolnir to function at its full power

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Families and Relations
Father: Odin

Mother: Jord

Brothers: Baldr & Vali

Wife: Sif