Although the most recent movie Thor was very good, it was not accurate at all. In Norse mythology, Thor is associated with a hammer, lightning, storms, oak trees, strength, the protection of mankind, and also hallowing, healing, and fertility.
Besides the movie not being accurate there are many differences between Norse mythology and Marvel Comics. In Norse mythology he has his red hair and a red beard. Marvel's Thor has long; flowing golden locks, and is typically clean-shaven. While the Norse Thor prefers to travel in style, the Norse myth travels with his chariot drawn by two magic goats Tanngrisnir and Tanngnjóstr.
In the movie, Thor was about to ascend to the throne of Asgard, and is tricked by his brother Loki to defy their father Odin. Against Odin's order, Thor travels to Jotunheim to confront Laufey, accompanied by his brother Loki, childhood friend Sif and The Warriors Three; Volstagg, Fandral and Hogun. A battle continues until Odin intervenes to save the Asgardians, destroying the fragile truce between the two races.
A big difference between the myths is that the Asgardians, The Warriors Three, really have no place in Norse myth, and wound up a part of the Marvel myths essentially because they thought it would make the story better.
For Thor's arrogance, Odin strips his son of his power and exiles him to Earth to live as a mortal. Odin, fearing the plotting of his manipulative son Loki, sends down Thor's hammer Mjöllnir affixed with a command that only the man worthy of the throne of Asgard can lift it. Thor must learn wisdom and sacrifice before he can return to his rightful place.
In the movie the Mjöllnir is one of the few things that are true. He wears a belt that gives him strength, gloves of iron that enable him to handle his hammer. Marvel's Thor has raw power but the Norse myth indicates that Thor needed a magical belt and gloves to give him the strength to use Mjöllnir to its full effect. In Marvel's version