I actually would have answered yes to all the questions, if what the OP is asking is whether there’s a way to get an estimate of financial aid without filling out the CSS. (There was simply some confusion in the question about what the CSS is).
The NPCs will give a good estimate of what each school will expect a family to contribute and how much aid can be expected to fill the gap. Some schools have a very simple MyIntuition calculator you could start with. You’ll need to complete one for each school, as each school will use a different formula.
I think the rationale for filling out the various financial aid forms even if you don’t expect need-based aid is that some schools might require those forms when considering merit scholarships, or for other non-FA reasons. You could ask each school.