Questions about Two,too,and to

1. What is the difference between two, too, and to?

2. How do you use two in a sentence?
3. Can you provide an example of the word too being used to express excessiveness?
4. When is the word to commonly used in writing or speech?
5. What is the proper way to spell the word for a numerical value of 2?
6. Can you provide an example of a sentence that uses both too and to?
7. Why are these three words commonly confused by English learners and speakers?
8. What is the pronunciation difference between two and too?
9. Can the word too be used to express agreement or confirmation?
10. How do you use to in a phrasal verb like "to come up with"?