Quick questions on the Comey indictment...

From the news: The basis of the grand jury charging Comey was the 2020 hearing on the FBI’s probe into links between Trump and Russia during the 2016 campaign. The grand jury charged Comey on two counts:

- Making false statements to Congress, and
- Obstruction of a congressional proceeding,

A third count of lying to Congress was rejected by jurors.

Questions:

#1: Did Congress file charges against Comey? Isn't that the first step in any crime? Someone has to file a complaint? No complaint, no injury?

#2: If the third count of lying to Congress was rejected, then how can Comey be indicted for "Making false statements?"

#3: If the hearing was about the 2016 campaign and Russia, can the full (Bill Barr 100% unredacted) Mueller Report be brought into evidence?