Has a cell ever been observed to create a totally different cell?
That wouldn't be evolution, more like a miracle, though laboratory experimentation has manipulated cells to produce other cell types, for instance, stem cells.
Not a very big miracle though. And yes, I think it has been observed.
Almost all reproduction among animals starts with a single cell called an egg getting fertilized and then splitting into new cells that go on to become liver cells and limb cells and lymph cells and ...
Your first task is to actually learn to read and to comprehend what you read.
Now you have been shown that cells can reproduce and differentiate into other types of cells.
But wait, there is more. Antibiotic resistance is another example. Beginning with a culture of just one type of cell and allowing it to reproduce under stress results in a new type of cell dominating, one that is resistant to the stress.
So now drop those arguments since they have been shown to be factually wrong.
Next let's address your "Life began with a single cell" mistake.
What has actually been said, and again supported by the evidence, is that life on earth first appears as very simple organisms.
Again, this is not something the Theory of Evolution says but rather the only possible conclusion based on the physical evidence.
So now those two errors have been covered you can begin to learn what the fact of evolution as well as the Theory of Evolution teach us.
Exactly. But still, no one has presented the working definition of information, how to recognize information or how to determine increase in information. In my example there are actually at least four significant, definable, detectable and applicable bits of information and your post added two more.