The calls will be forwarded to your existing phone number, so you don't need any new phone lines or equipment.
I will try to explain the differences to you so you can make a wise decision on which plan to choose. Hatchling is the traditional 1 domain per account type of hosting. With domain names being so cheap today, you will have a very high chance of owning more than 1 domain.
That's why 1 domain per account is really very limited!
https:// so it won't popup any warning message and make you more trustworthy to your customer.
A dedicated IP address (also knows as static IP address or unique IP address) is required when you need to use your own private SSL certificate.
This is a technical requirement so I won't go deep into it as you probably don't need to know.
It it important to note that many ecommerce website are not using SSL certificate at all!
Almost all top e Bay sellers are using Pay Pal to collect payments and they don't need any SSL certificate or dedicated IP address either.
So, there is a high chance that you don't need it as well.
The only reason you need it is when you have your own merchant account. Non US based customer will also have a hard time opening one. ) with an internet connection to connect to your account and upload/download files.
And if you still haven't have a merchant account, I will recommend you to simply stick with Pay Pal or 2Check Out at the initial stage for cost savings and less hassle. Of course, they can only access a public folder in your account (they won't be able to touch your private files).