He can pretty easily find a job delivering stuff, particularly machinery to different technicians throughout the city. If he's looking for something a little less pristine and polished, you can definitely earn a pretty penny lugging stuff around down at the Races; they're always looking for a helping hand. Canteens for water would be difficult, as the robots don't really need water! But he can find containers similar, along with rope. Knives, for some reason, are a little tricker, though Keiichi can find hi-tech add-ons to androids that are very sharp that he could likely turn into a knife. They don't have handles, though.

2. Weirdly, for a society so advanced, no! There is no space travel. But they do have an incredible technological system to map and watch the stars. If you ask, the androids will simply tell you that they have no need or want to leave.