A degree in pharmacology and a Pharm. D are not the same thing. Pharmacology is the study of the interaction of drugs in living systems. (
http://www.pharmcas.org/advisors/pharmacypharmacology.htm) and a Pharm. D (Doctor of Pharmacy) is the degree required to be a pharmacist. A pharmacology degree is more geared towards doing research for drug companies towards researching new drugs or investigating and mitigating side effects from existing drugs - things of that nature.
There are 2 different groups of people that work in pharmacies, one group is the pharmacy technicians. In some states, you can do this job with nothing more than on-the-job training, others require you to take a test called the PTCE (pharmacy technician certification exam). This is an okay entry job, but the pay starts relatively low, $8-12 an hour, a bit more if you have the certification and a bit more for seniority. Pharmacy techs are responsible for all of the "grunt"-work of the pharmacy. (I can say this without being condescending because I used to do this job

) They take the prescriptions, transcribe the info from them into a computer, put a label on the bottle and (in many pharmacies) put the pills in the bottle. By law, every single thing that they do must be checked off by a pharmacist before the drugs can be sold to the patients (which the techs also do).
The other people are the pharmacists, they are the ones with the Pharm. D degrees and a year of internship under a registered pharmacist to get the title of "Registered Pharmacist, RPh". They are the ones ultimately responsible for ensuring that people get the right medicine in the right strength with the right dosage instructions. Their job is also to make sure that each patient understands their medicine and how to take it and the potential side effects, etc. Unfortunately, with a lot of big chain pharmacies, their role is often relegated to "pill-slinger". These big chains simply take on so many customers that there isn't time for the pharmacist to offer good counseling to patients and they struggle just to keep up with the prescriptions and ridiculous problems with insurance plans and other things of that nature.
Pharmacy school is 4 years long, and most pharmacy schools you can get in with 2-3 years of pre-requisite coursework. A bachelor's degree is usually not required, but it makes your application a lot more competitive. You would have to check individual schools to see how competitive they are and what pre-requisites they require. Usually it is something like : 6 hours gen chem, 6 hours O chem, 6 hours A&P, and probably 6 hours biochemistry. Many schools have more in addition to this.