Iam stuck at when you have to get the 2nd item for martin(the part when you go to a ruined place and there is alot of skeletons and ghosts. I ve killed the first guy but i cant find the other 3 guys and the ghosts always kill me, how do i do this part?

You say you are getting killed by the ghosts? What type of a weapon are you using. You must use either a silver, daedric, or magical weapon to kill a ghost.

Yeh iam using a silver sword but the ghost still kill me -.- , oh and how do you level up? usually i just sleep and i level up. But whats the proper way?what do you have to do?

by practicing skills for example, killing something with a blasde will make your blade skill go up and when your skills go up enough it will say you need to sleep to level,