yes i think you can
Yes it is possible to export everything. You have to go to the settings of Gmail. In the settings you can find import from Hotmail.
You cannot convert a hotmail account to Gmail. You need to create a new one to replace other. However you can import contacts from hot mail to Gmail.
You can transform your hotmail account into a POP3 account via Izymail (izymail.com). Either you can let Izymail forward your hotmail emails into your Gmail inbox, or you can use Gmail to automatically download your hotmail emails.
User can send a mail from Gmail account to other ones. Hotmail and Yahoo are examples of those. Gmail provides cross server mailing too.
Using hotmail and gmail, you can have that setting in hotmail.
No, Gmail account can only be created via google ID. You cannot make it by Hotmail ID. However you can send mails between these two.
Gmail account has only one link to it. It cannot be linked to other profiles. A Gmail account is individual on it's own.
Gmail and Hotmail both are good for business. Gmail has more modules and better features. This can be the advantage of Gmail over hotmail.
Gmail and Hotmail are two different email services.
Hotmail came before gmail.
You cannot sign for Gmail with hotmail account. Gmail has to be logged in via gmail interface only. The Gmail allows entering only via it's ID.
You can write a mail to a person on hotmail. You can send the person mail from Gmail to hotmail easily. Gmail supports this kind of sending mails.