Yes, you have to kill people on Fallout 3 because they are trying to kill you. You also have to kill them to obtain their armor, weapons cache, food and other supplies. There are also super mutants, ghouls, radroaches, radscorpions, raiders, super mutant behemoths (5), Deathclaws, Mole Rats, Vicious Dogs and other things that also need to be killed in order for you to survive
You can sell your stuff. Or you can kill people to get it. :)
No, Fallout 3 is not food. If you ingest it, it may kill you.
Kill people, do quests, pick locks, and hacking terminals.
crouch Hidden Attack!
No. Unless they wonder in your house, but when I see people doing that, I kill them. :)
by the house
yes.
Yes there are. Various people wear them. kill them to get it. Mr bourke in megaton is easy to kill and hes available from the get go.
In Fallout 3, when most characters die, they die for good. There are a few exceptions however. In the player owned houses (POH's), the Mister Handy's re-spawn twice if you kill them.
The super mutant behemoth
you can kill people for them, u can buy them, u can steal them.
You can kill people and steal their stuff, and sell them. :)