1997 Nissan Altima Brakes

My brakes squeal the first couple times after I start my car every day but after that they are normally fine. Is this something I should get checked out or is it just getting warmed up from sitting all night? What would the repair cost labor + parts be for all wheels? I am thinking it would just be brake pad replacement?

Also, recently, my car started making weird, maybe ABS (almost a deep popping noise), sounds when I take left turns, especially sharp ones. My grandfather just got my wheels aligned, my front rubber boots replaced and I think he said my link pin was replaced as well. What could it be?

Thanks!