Yes you can but only on Premium VPS plans.
Yes, every Minecraft server comes with a dedicated IPs at an additional charge, the port number would be 25565 (default for dedicated IP)
Yes and No, We can install some Minecraft Plugins for you, but not all. Also we do not configure Minecraft Plugins for you.
Yes E-mail is included with you purchase of web hosting. Each plan has a different amount of e-mail accounts you can make with-in cPanel.
You may create a support ticket or email email@example.com for a dedicated IP on your Web Hosting at an additional charge