Do we actully know if Draco has the Death Eaters mark.

Yes, he would not let Madam Malkin tuch his arm when he was trying on robes, but that dose not mean that he has the mark.

He did the whole "I'm going to kill dumbeldor" thing because he was afraid for his mothers life.

Well I dont want to think what the Dark Lord is going to do to him. Draco was supose to kill Dumbeldor, not Snape. I think that they both are going to be in trubble with the Dark Lord.