Some questions before going for Zoho

Some questions before going for Zoho

I'm looking to Zoho Business to host my small company, and I have still some questions :
1/ I own my domain that I would add to Zoho business, but creating new emails is considered as creating new users (invoiced by Zoho) if I add some emails like support@mycompany.com ?
2/ we have a small website, only static content, could that website be hosted by Zoho at www.mycompany.com ?
3/ is there any solutions of backup ?
R.H.