There is No limitation for creating and managing the leads
You will get the following Email alerts
Yes. Customer will be notified about their lead / enquiry assignment with contact details of your sales person. This email content can be configured by admin in Email Notification Settings.
Yes. Those are optional data and not mandatory.
There is a link "view closed leads" just below the header in "Leads" section. You can click and search the closed leads by email id or customer name.
If you set a next follow-up for a particular lead at 3pm today. But if you have not udpated the lead by 3pm then it will be considered as you have missed to follow-up that particular lead.
Yes. You can click on "Lead Statistics" link and it will take you to the statistics page where you can generate the report based on the date range for your team member (sales executive).