razo+r

Distance has nothing to do with it. You can get tasks way outside of 10 miles, not sure about specifically the IP Inbound call though. In the mission you attached, you didn't set it up properly. You gave him the FAC task, but set him up behind a mountain, unable to see anything to FAC. Thats your main problem. And a tip, try to avoid double tasking. Like for example you set him first to FAC on frequency 133. Then you gave him the task to set frequency 131, and then in another task you gave him the task to set frequency 133 again. It doesn't harm, but try to avoid it. You never know how fragile DCS is. So in order to fix your mission: Place the JTAC somewhere with a line of sight to targets (and perhaps set him to invisible) -> Your main issue in this example After that he should talk to you just fine. I've tried it with the A-10C and it works. No idea why the AH-64 refuses though.

Settings -> Controls -> Category GUI Layer

There is also a slow down button. Probably Alt + Z or like that. It should be listed in the controls list. Also, return to normal speed is probably Shift + Z. Just check the controls...

After you have chosen the time, provided you use the correct radio and correct radio PTT button, JTAC should talk with you and give you more options.

Just google... If you have more specific questions, you can always come back. But asking "how to navigate" is simply lazy, IMO. Look for VFR / IFR procedures, look into the manuals for navigation equipment, search for these on youtube/google. It's all out there.. I mean, you don't even tell us which aircraft. Navigating in a FW-190D is substantially different compared to navigating in a F-18 within IMC. Oh and don't expect a single 12min video to properly explain everything. If you want to do proper navigation, it will take hours of practise.

Check your keybindings for any unwanted assignements like MFD brightness for example. Also check the axis controls.

Of course you can place down any unit you'll find in the editor. You cannot fly them, but the AI sure can.

The only thing you could do is load the mission you plan on joining in singleplayer, fly it for a bit and then check in the MP server selection screen if the IC got triggered or not. Sometimes a simple restart of DCS will solve the issue, sometimes not. The IC has been not working as designed for an eternity and there does not seem any intentions of solving the issues. You just have to live with it and hope the IC has a good day.

Here, might help:

Correct. Visibility arg for turning the light on/off/dimming.

Keep clicking on the icon, that will cycle the selection through all aircraft stacked on top of each other. Otherwise there is also the unit list available to you with which, as you can imagine, is a list of all units in the mission.

It consists of 3 planes, one on each axis. Then assign this light texture to it, and set the material property to bano.

It was changed at some point. You can now open any mission containing any mod regardless of MP or SP.

Technically, yes. Would I recommend it? No.

Yes, any unit that you do not have will be replaced by either a Su-27 or Leopard 2, depending on the unit type.