Unless you have a Signal Generator,you won't see anything much at pin 13 .
The signal from a FM Broadcast station is going to be so small at that point,as to be indiscernible.
This Device is a Superheterodyne,so possibly your Local Oscillator isn't working.
You will be able to probe pins 5 and 6 for this signal,as it is much higher in level.
Don't expect a lot in level accuracy,as a X10 'scope probe doesn't look high impedance at 100MHz,but you should see something on one of these pins if your Oscilloscope is 100MHz or better bandwidth.
There seems to be no adjustable RF tuning,so you just tweak the LO to select stations--a 'scope will show if the LO tunes OK.
I also notice there is a "mute" function built into this chip,which could be operating.