This quests wants me to go to ceaser so I can try and get some information to show the khans there not good.

The problem is, when I get to close to this guard at the front door, he turns hostile, but not any of the other guards.

Even if I kill him and enter, ceaser then becomes hostile

Im already hostile with the legion but Im wearing legion armour so i can get into the area safely but its only when I get to ceasers tent I get attacked

If you got Caesar's Mark it should have rest your Legion Reputation to neutral. How did you get a negative karma if you are doing Caesar's Quest Line?

the faction armour can be seen through by guards and dogs... i'm guessing you're going to need to sneak around the guard somehow.

at least that's my guess.

Yeah it is that, I just walked up to a legion dog and everyone just went hostile

You do not lose reputation (or incur aggro) if you kill someone without being seen.

If it is possible, try sniping that dog (from really far away) while you are [Hidden]

tryed it and theres two problems

1: the guy becomes hostile as well if I get to close (the door guard)

2: theres a dog on the inside of the building that is right infront of you when you go in

Man this is annoying

Is there an invisability console cheat i can use to get past? something that makes all NPC's not see or attack me

so i can complete the quest then leave