Yes, all the other pins for CCS are the same.
The cloned versions of VCDS work the same as the original ones, but as I told you, it depends on the level of hacking and updating. You will be able to do everything you propose.
The super bad side is that you don't reward the super/excellent work that ross-tech does so that we can use/enjoy this magnificent tool in an updated way, which will help you diagnose and repair your car
'forever'.
Ross-tech is constantly working to improve/evolve their tools, ... I invite you to read the incredible work they do in their own forum, you will see that they provide assistance to their customers in everything they can. Without a doubt they deserve the best.
Keep in mind that it is possible that with a single repair you could have more than amortized the tool, and if you read the ross-tech forum you will see that on many occasions users/customers find the solution to their 'problems' there.
VCDS is a very good diagnostic tool that is widespread throughout the planet, many forums with a gigantic number of users, each user with their particular idiosyncrasies...
Yes, the numbering for the wire pins for the trip computer for low instrument clusters is the same for all 6Rs.
I don't know of any tutorials to do an OEM installation of the remote controls. Maybe someone who has done it could help here.
I think it is very easy to do, once you change to BCM High (087), you can add the remote controls you want to the IMMO system, you also have to match them to the BCM. You can do the IMMO part, or everything, at a VW dealership or specialized stores/places. More specialized tools are necessary (VAS-ODIS or etc...).
You may have to add some wire to make everything work properly, you just have to study/make a comparison on the Convenience system diagrams.
It's okay to plan things in advance but I recommend that you do things little by little and step by step. Open threads in the forum separately for each thing you want to do, this thread should be only for the CCS... it is likely that you will receive more help from more forum users, there are real experts/masters/gods of knowledge here.