Brakes aren't adjusted properly, if you have a low pedal. You may also find you need need brake shoes. As it is a new car to you, i would say it is most certainly needing new shoes. Buy a set for all round, fit them, or have them fitted and adjusted. And it wouldn't hurt to bleed the brakes, god knows how long ago this was done. By bleeding the brakes you will also soon find out if the wheel cylinders are seized as well. Good chance this is the case. All this in parts would be about $200 plus labour. Thats pretty well the worse case senairo. But they are your brakes, it is what stops you from killing yourself and others. Best sort them out ASAP.
Cheers
Aaron