None of the default aircraft have autoland capability. There are two main problems:
1. The aircraft does not flare.
2. The throttles do not close (retard).
In other words, it just flies straight down the glideslope on to the runway, and then the autothrottles ensure that you maintain the approach airspeed all the way along the runway - which is painful :%:]

However, in many payware aircraft, and in a very limited number of freeware panels, autoland is included (in the latter it is often very crude).
I will explain the procedure in the PMDG 737-800:
1. Aircraft is at about 180 knots, flaps 5, gear up, on LNAV or HDG mode with APP mode armed. ALT mode is active. SPD mode also active. CMD A active. Both NAV1 and NAV2 have the ILS frequency tuned in, course arrow on the ILS course.
2. Aircraft intercepts localiser. HDG/LNAV disengages. Flaps to 15, SPD mode reduced to 160.
3. Aircraft intercepts glideslope. ALT disengages, leaves only APP and SPD. Flaps 30, Gear down. SPD to VREF + corrections. Landing checklist. Single Channel is annunciated in the PFD.
At this point, the aircraft would behave like the stock aircraft - it would just fly straight down on to the runway.
4. CMD B (second autopilot) is turned on to monitor the first. CMD is annunciated, replacing Single Channel, as is the word FLARE (below G/S), indicating the autopilot will flare the aircraft; and RETARD (below MCP SPEED), showing the autothrottle will close the throttles.
5. At about 30 feet, the FLARE and RETARD modes become active. The throttles close, and the aircraft pitches up to around five degrees.
6. On touchdown, the autopilot is disengaged and the nose manually lowered gently to the ground. Reverse thrust is applied manually, but the wheel brakes are automatically applied; also the spoilers (which were armed) are automatically deployed.
7. Runway is vacated (after manual wheel braking, which disengages the autobrakes), and you call for the after landing checklist from the FO.
But most of the time, even if the autopilot is used to follow the ILS, the pilot will land manually because it's good practice.
And yes, IVAO uses the same runway frequencies (ILS) as offline - they are part of the scenery, which is not changed by IVAO.
Can't help you specifically with that MD11 panel - sorry. I have just written too much
