AvroLanc

This is correct as is. Some RAD ALTS work much higher. Please don't get this changed for gawds sake.

No, there’s no way of doing this in RL.
You have the ability to save all target locations as you already describe.
 
I guess the problem in real life is that FCR information can get stale real quick. The TSD symbols even dim after 5s for moving and 30 secs for stationary. Detected targets are designed to be acted on quickly. What is a column of armor in one location could be a column of trucks 3 mins later. You can already store a location and make a mental note that it was a platoon sized unit of tracked vehicles, but you’ll want to rescan to engage anyway.
 

With C-HMD selected use the TEDAC SYM button. 

Yes the curved trajectory is deliberately off-axis. It's curved to give the missile DBS - Doppler Beam Sharpening. Basically giving the seeker a high LOS rate vs ground speed vs terrain -to pick out the target against the ground clutter.  
You'll notice the LOBL shots have a much more direct trajectory. They don't need DBS, because they're already locked on.
Very nicely done by ED.

It was once suggested by ED that buddy-controlled MITL datalink stuff was planned….but we’ve heard nothing since. 
Safe to assume that it won’t be added anytime soon. 
Although maybe with the future F-4, F-15E….GBU-15, AGM-130 etc it might get looked at again. 

The max height of the rad alt is 1428ft. The aircraft can’t measure or use rad alts higher than that. 

Yep, the profiles don't switch automatically. You'd set both Profiles and change the Profile when you change weapon.

With NVS MODE in NORM, the TADS is unavailable for use as a sight, so that's your problem. (In NVS, the TADS is being used as a 'Sensor', not a 'Sight').
Put the NVS switch to OFF, sight select TADS, and then ACQ Source to GHS. Now press the slave button and the TADS will follow the HMD.

No it doesn’t triangulate or provide a passive range at all. 
It’s a more sensitive RWR. RFI can detect a higher frequency range than a RWR and is more likely to make the correct classification. It also provides a more accurate azimuth bearing than the RLWR. 
When RFI is the ACQ source it slaves the sight to the detected bearing in azimuth and the local horizontal in elevation. You need take over and search visually, with TADS from there. 

The cued search function slaves the FCR to the detected bearing and automatically starts a scan. I imagine that if an air defence vehicle target (FCR can classify these) is found along that azimuth it tries to correlate the two detections into one target symbol. 
Bear in mind the FCR only has like a 8km max range, so this doesn’t turn the Apache into a SEAD machine or anything. 
 

You can't view the laser range except through the TADS video page.
But, if you've stored the target as a CM or WP, you can set that as your ACQ Source and you'll get a NAV rage Nx.x in the HAD. It helps. Of course if you've stepped to front seat, you can lase and store a T point and use that for later for Nav range when you swap back to pilot.

OFF NORM FIXED switch, left knee, left sidewall 

The altitude switch on the HUD Control panel isn't implemented correctly yet. Which is why you don't see any difference currently.

Multi Target Tracker. Allows you to get a contrast auto track (think point track in TGP terms) on a Primary target and up to 2 secondary targets within the TADs field of view. You can then quickly step between the tracked targets with a HOTAS command. 
 
I don’t know whether any form of Image Auto Track will be present at Early Access? If not then we’ll be reliant on manual tracking/slewing which might get interesting with a moving target….. 

Once you’ve pressed WPDSG, the same option at PB 19 becomes O/S. Press this and you’ll designate the offset.