What kind of summary of the leads can I receive?

3.) As the sales manager, what kind of summary of the leads can I receive?How many total # of leads? How many each sales rep received? What action was taken after it was passed onto the sales rep?

In other words, tracking the metrics?

I guess you can check that in Form Analytics?

Guide: Understanding-Form-Analytics-and-Ways-on-How-to-Get-Your-User-s-Info

You can also check the form submissions page to check the total submissions made in the form.

Guide: How-to-View-Form-Submissions