Sometimes, usually not. It's often (but not always) funded by “school district”, which is often much larger than a neighborhood and may be a large metro area, and often with statewide funding mechanisms that reduce disparity between districts to less than it would be on its own.
Yes, that’s true, but it's not a product of funding by neighborhood, because that's not how the schools in that case are funded.
It's been fairly strongly argued that that's actually because the schools themselves make almost no difference at all on average, and school outcomes are pretty much determined by socioeconomic background and other personal traits of the student with ransome variation, and the “good schools” are just the ones attended by the students with the traits that would produce, on average, good outcomes independent of what school they attend.