Raven (Elysian Angel)

Yes, as is confirmed in the Supercarrier FAQ:
 

Yes you can:
Make sure the little tank icon (show models) is ticked in the Mission Editor

Have you looked at the track yourself? You are indeed skidding: you can clearly see that even in cockpit view, but I played through the track a 2nd time in F2-view and then you can clearly see the nosewheel dragging along trying to plough through the runway 😉
I suggest you re-centre your nosewheel before hitting the high-gain button. I think you were hitting that *while* in a turn, which is a mistake. You'll have the same thing happen in the Hornet: centre the pedals before hitting 'NWS HI'.

Known issue: there are other threads about it already.

Our Huey (and most other older modules) use graphical technology from the DCS 1.5 era (afaik our MiG-21 is still stuck in DCS 1.2). It doesn't support PBR etc that was introduced with DCS 2.5 in early 2018 (more than 5 years ago). It creates issues with how the current lighting model interacts with the materials, for example.
ED have stated numerous times that they plan to update all modules up to current standards, but it's taking MUCH longer than most people like...

Hey,
 
There are several "cockpit liveries" available for download in for example the "User Files" section of the official DCS website. Some people also make their own, with a few added decals etc.
 
Personally, I use a combination of 2 different cockpit mods: one with mipmaps removed for increased readability in VR, and clearer green cockpit glass in anticipation for a new cockpit model by ED that supports DS/PBR.
 
No so, there's no need to worry. Yes it's an old module that doesn't support changes ED made to DCS over 3 years ago, but we're all in the same boat 🙂