copy and paste only images name not its path
I see what you are saying. If you select a picture file in Finder and Copy, then Paste into an Outlook message, you get text of the full path starting with "file://". That is because copying in Finder does not examine the contents of the file. It examines only the file handle and copies that path. 

If you want to copy the contents of a file, whether it is a picture file, text file, or what, you must get access to those contents first. You must open the picture with something. 

So whatever file you want to put in an email, double-click that file, then select all, then copy, then paste into the email.

The other option, as Kevin said, is to drag the file right into the email message. That will attach the file.  But it sounded like you wanted the content of the picture(s) in the body of the email.  My method above is how you do that.