Yes, you still qualify to use PharmCAS. Even though you have a B.S. you have not yet started a Pharmacy degree so you will be a "first year professional pharmacy degree applicant." The first year part of that is referring to your professional school not your undergrad. So, for example, say you started a Pharm program at one school but then wanted to transfer to another one, then you would not be a first year professional pharmacy degree applicant and would not apply through PharmCAS.
As far as your financial aid question, it varies by school. Most schools do consider it a graduate/professional program and thus you qualify for that type of financial aid, but some schools are strange and do not consider you to be a graduate/professional student until the 3rd or so year. You should check with each school you are applying to in order to make sure.