synthetic brake fluid suggested
If you use a synthetic brake fluid, like Prestone DOT4, you don't have to change the brake fluid every year - you can go a couple years.
The brake "squeal" is usually caused by various vibrations. Did you put that brake pad compound (gel) on the back of the new pads?
IF you smell hot brakes, probably a sticking caliper piston, not allowing the pad to retract from the rotor - typically caused by some rust, or a damaged piston.
The caliper overhaul or replacement will most likely fix it.