Check the Form and find out what field Comments is connected to. The answer will lead you down the correct path.
- Comments or Description in SFDC may = Person Notes in Marketo. There's a doc on this recently posted.
- Could be another field.
- Yes, you can sync or make it sync. There are a lot of threads on this.
- You can add it to your smart list View. See doc on that.
- No, you cannot see a list of all the data submitted with a form unless you go to the individual's log history. So you are on the right path.
What field did you use on your form for the comments? When you know that field you can add it to the viewed fields in your smart list for 'filled out form'. And then you can see if that field is also sync'd to your CRM if you want others to see the comments.