Welcome to the forum, and happy holidays!
Luckily, I like reading manuals.
The manual actually shows the back panel for the 1010, so I'll assume that they are similar based on the specifications provided on Pioneer's website for the 810.
It appears that you have an S-Video input - did your modulator happen to have one of those? Btw, you mentioned buying a modulator. Did you buy a digital TV tuner? If not, you need one to convert the antenna feed into audio/video.
I suggest looking into a digital tuner with an HDMI output. Magnavox sells units that also have hard drive DVRs and DVD burners in them, but the new ones costs about $300.