[Salvation]

Just for starters on your post —

To whom are the prayers addressed to during the Mass?

Only one prayer is addressed someone — who is that?

[Alamo-Girl]

Jesus Christ taught us all how to pray:

But when ye pray, use not vain repetitions, as the heathen [do]: for they think that they shall be heard for their much speaking.

Be not ye therefore like unto them: for your Father knoweth what things ye have need of, before ye ask him.

After this manner therefore pray ye: Our Father which art in heaven, Hallowed be thy name. Thy kingdom come. Thy will be done in earth, as [it is] in heaven. Give us this day our daily bread. And forgive us our debts, as we forgive our debtors. And lead us not into temptation, but deliver us from evil: For thine is the kingdom, and the power, and the glory, for ever. Amen.

For if ye forgive men their trespasses, your heavenly Father will also forgive you: But if ye forgive not men their trespasses, neither will your Father forgive your trespasses. – Matthew 6:7-15

It is not a self-serving prayer, therefore it is not a "vain" repetition. Jesus Christ is the bread of life.

And Jesus said unto them, I am the bread of life: he that cometh to me shall never hunger; and he that believeth on me shall never thirst. – John 6:35

It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, [they] are spirit, and [they] are life. – John 6:63

When we speak (or think) the Lord’s Prayer, we align ourselves to His Name, His will, His kingdom and we ask for His continual indwelling (bread of life) and protection for all of us.

And we ask Him to judge us exactly as we judge others.

Pray without ceasing. - I Thessalonians 5:17

Praise God!!!