Canon has 4 mounts that I know of:
FL "Super-Old School film", FD "Old School film", EF "Current Film and digital", EF-S "Current digital"
EF came about mainly to standardize auto focus. They are currently the standard Canon mount, fitting all current Canon film and digital SLR's. Only a select few FD mount lenses had the capability of auto focus and changing the mount opened the flood gates for new technology. Adapters are available to join FD lenses and EF camera but there will be a very large hit to image quality. Instead of simply connecting the two mounts together, the adapter must act as its own lens to battle distortions created between the two rival mounts. In the end it usually isn't pretty.
I suggest you buy all new lenses. If you are determined to use your FD mount lenses, get a Canon AE-1. It might even be the same camera you owned back in the day/still own, but it can still do the job.