No, Thor doesn't adopt a kid in the comics as far as I know.
Yes, he does. Thor's kid in the comics is Torunn. This character brings new elements and challenges to the Thor universe.
No, Kid Loki didn't kill Thor in the comics. Their relationship was complex but not to that extreme.
Yes, Thor has died in some comic storylines, but he often comes back in one way or another.
Maybe. It depends on the plot and the author's imagination. Sometimes characters take unexpected turns in fanfics.
Sure does. Stormbreaker becomes an important part of Thor's arsenal in the comics. It gives him additional strength and abilities to face various threats.
Yes, Thor has kids in the comics. For instance, he has a daughter named Torunn.
Yes, Thor has a sister named Angela in the comics.
Yes, Thor does have a daughter in some comic storylines.
Yes, Thor does get fat in some comic storylines.