New TiVo OTA

New user, leaving directv. I have FIOS internet, no FIOS Tv. 2 AirPort Extremes providing wireless

Current wiring has one cable outlet for fios internet, the rest of the outlets are direct tv. Will be receiving the TiVo Ota box and 2 mini's.

Questions,

1 do I need to completely remove the direct tv feed and connect the fios internet connection so it goes to all of the outlets in the house?

2 is the fios internet, actiontec router, mocha ready? My ONT is in the garage and a coax cable is connected to the fios router

3 if fios router is already mocha. Do I need only 1 mocha adapter for the OTA DVR?

Thanks in advance

Bill