That SP15 is a terrific turntable, it's specs beat many of the best TTs made today, scroll near the bottom of this list.
It is simply a spinner, you need a separate tonearm, with a cartridge and the bottom of the tonearm will have concealed connections for a phono cable to go to a phono equalizer in a preamp.
If you like it's looks, you would need to find/buy a Technics base, buy a tonearm and cartridge.
a. in a technics base made for the SP10 and/or SP15 models
b. with a dust cover (came with the technics base)
c. separate tonearm with cartridge (chosen by former owner)