Yes (During the holiday, you can't turn on a light, turn off a light, turn on a car, turn off a car etc. But during The intermediate days, you can.)
There are brands of kosher for Passover baking soda but they have to be marked specifically for Passover.
It should be labeled as having had rabbinic supervision for Passover use.
Both are fine but have to be certified kosher for Passover.
Though some brands of granola are kosher for non-Passover use, no granola is kosher for Passover. For Passover, you can get fake 'granola' that is made from matzo. Or, it may be fun to research ingredients and try to make some on your own.
Most authorities will permit its use as long as a reliable authority has approved it for regular (non Passover) use; some authorities require Passover certification. Some groups now classify quinoa as kitniyot and thereby not eaten by Ashkenazim.
If you were able to find corn vinegar that is certified kosher for Passover, it would be kitniyot which means that the majority of Ashkenazi Jews would not use it.
during a passover seder.
Ordinary Sweet 'n Low is not kosher for Passover, but they make a special run that is. Look for it in kosher supermarkets before the holiday, or ask your local supermarket to order it for you.
Everything that would be used for regular bread.
we use electricity a lot because we use it for the lights and refridgerator,etc.
Yes.
Yes. It should be labeled as having had rabbinic supervision for passover use. Note that Kosher for Passover certification is distinct from the Kosher certification that non-Passover wines may have.