Where can i get a new sword? I have no money, no hatchet and my sword is broken. Not every house in the village is build. Where can i get now a new sword to fight slimes to get water and money? Is there another way to get water?

Had same problem..
You can kill slimes with a hatchet pick or sickle, in sewers they give 10gold, in forest more.
Sometimes slimes in forest drop weapons (rarely but sometimes)

You can sell gathering materials and then buy a new sword in the blacksmith shop too.
Water not sure, but if you eat normal food it seems to fill up the water too.