I have been to both Catholic primary and secondary schools and despite being taught scripture, we were in no way pressured to believe in it. I chose to, as I both believe an have been raised to believe. That, of course it irrelevant.
My unbiased opinion is that you should be alarmed at the fact that they, the school, is teaching you child about religion, and not just about its existence. Even though I am all for teaching of religious scriptures, I also feel that it should be reserved for select schools and not taught to those who have chosen not to attend these schools.
The pictures you posted of the things she was getting sent home even alarmed me as I have never received such items at either of my Catholic schools. The only stuff I have ever been involuntarily given is from the Jahova's, which I choose not to read, not because they teach different principals, but because I have better ways to both waste my time and learn about religion than from some cheesy pamphlet.
At a higher secondary level at the Catholic school I attended, the compulsory religious education subject turned from studying the Bible to learning ethics and morality without much mention of God at all.
From my religious point of view, if you do not wish you kid to learn about religion, then contact the school, which has been mentioned, but also refrain from having her baptised (or any other initiatory ritual). I don't believe religious propaganda should be given to anyone, let alone naive children. I can only speak from my own experiences, but I can only imagine that the school, religious or one that offers teaching of scripture, would only teach the most basic of Biblical stories and religious concepts not promote and force the child to believe and join a religion.
Whilst you still can, if you choose, teach your kid yourself about what religion means to you, which I assume you feel is nothing more than a load of bull, and tell them your own beliefs whilst they are still impressionable. They may grow up to wish to join a religion, which I feel you shouldn't hamper, it is ultimately their choice, but at such a young age, it is not a choice to be made by the kid. My parents wanted me to be a part of a religion and I have grown up to accept religion. If you teach them that religion is false, I am sure they will believe the same.
All of what I have said may not be helpful, I am still relatively a child myself, let alone have a kid beginning school.
I bid you good luck with your predicament, and trust you will make the right decision for your child.
EDIT: Binaural pretty much said what I was trying to say but in fewer, less confusing, words.