You have to compose the email to send. The sender's name has to be put in. The subject of the mail is optional if you want.
You can send images to Gmail via phone also. You need to have Gmail signed in on phone. Then compose a Email and click on attach.
You need to have the email ID of the recipient. You can write all the details about using Gmail. Then you can click send to send the mail.
Yes, Gmail is an email system.
You can send email messages using hotmail but im not completely sure in you can chat with them with a yahoo or gmail account.
You can send mail from gmail to other email id the same way as you do it for gmail IDs.
Yes, it is possible to send it. It is because Gmail is able to send data to different services too. Gmail can send an email to Live too.
Yes
You cannot send an SMS using Gmail. Gmail is for sending mails and chats. You can however send a mail to the person in their mailbox.
You need a recipient ID to send an email. If you do not have any ID, you can't send the mail. To send a mail to naver, you need his Email ID.
You can send mails from Gmail to other mails. Gmail allows sending to yahoo, hotmail etc. This increases the functionality and it's scope.
You can send effect designs via attachment in email. The size in Gmail is limited to 25 MB only. After that, it should be sent via Drive.
It does not cost anything to send an email. Gmail is a completely free of cost service. The only cost is the internet your network provider will cost you.