Too is a substitute for also. This also annoys me. This annoys me too.
Too also can be used to mean excessive, as in too big, too loud, too beautiful.
To explain something within the sentence without finishing the sentence before explaining.
Sometimes. It depends on the sentence.
I see you are going to the movies,I too, am going to the movies.
There are few magnanimous people in this world.
The pig ate from the trough.
I wouldn't put too much thought into that.
By putting as much description but not too much
She loved the gift but it was too extravegent
There are too many possibilties. You need to put it in a sentence.
Put it in a sentence: too many ways to translate the word.
Many people feel that introverts are too inscrutable.
A person could easily die if they are too gullible.
The chicken pie was very salty as too much salt was put in while cooking
Yes, you can start a sentence with "if" to introduce a conditional clause. For example, "If it rains tomorrow, we will stay indoors."
No, you can't and I can't explain it to you because it's too hard to explain.
I contemplated doing the project myself, but it would have taken too long.
Yes, it is generally a good idea as it prevents that sentence from becoming too long. It is like a "pause" in the sentence.