CTET

https://www.google.com/url?sa=t&source=web&rct=j&url=https://ctet.nic.in/CMS/Public/View.aspx?page=74&ved=2ahUKEwig9p-k85vmAhUszDgGHVFmCcwQFjAAegQIBhAB&usg=AOvVaw2hEmqZSJaQQadOysxdhOyy
Check out this link.

You have to submit a valid proof ID and a stamp.

Yes, it will be valid as the court declared, but rules get changed from time to time and it depends on hiring authorities.

According to the decision of the court, it will be valid but it totally depends on hiring authorities.

Yes, you are eligible for the same.

Cut off marks for CTET
Unreserved category 60% i.e. 90 Marks
Reserved category 55% i.e. 82 Marks.

Yes, now you can fill the form for teachership.

The CTET cutoff score for Paper 1 and 2 is 60% of the total marks. Candidates have to secure qualifying marks according to the paper they have selected for taking the exam. CTET Paper 1 is for becoming Teacher for Classes I to V for (Primary Stage) and paper 2 is for Classes VI-VIII (Elementary Stage). Candidates can check CTET cutoff for paper 1 & 2:
CTET 2019 Cutoff or Passing Marks for general is 60% (90marks out of 150)and for sc/st is 55%minimum (82marks out of 150).