Copy-Paste from Mac to Emacs of ubuntu
I think there are two issues here. One is how to copy from Mac to Ubuntu. That is the work of the VM. You have to set it up and oftentimes it depends on capturing the mouse/keyboard (you may want to look it up in your vmware config for the specific VM you are using, I mean, the one running Ubuntu). From what you said, it looks like this part is working ok.

Then there is a question about the Kill-Yank ring in Emacs. Usually, you kill (cut) using Command+K (it kills from the cursor position to the end of the current line; you can kill characters with Control+K or words with Option(alt)+K) and you paste with Command+Y (it will paste everything that you had killed just before yanking it up). So, unless it is somehow configured differently, whatever you copy or cut with Command+C or Command+X on your Mac side (provided it is correctly configured on VMWare) should be available on Emacs by using Command+Y not Command+V. 

Hope it helps.

P.S. There is also another trick: Ubuntu tends to think of the mouse as a peripheral having three buttons. Selecting something (just selecting, not copying or cutting it) and pressing the middle button normally pastes it at the cursor position (I don't know, nevertheless, how your VMWare-hosted Ubuntu would differentiate your middle button. Sometimes, it means pressing both buttons at once. On some configurations, you will need to press a modifier (Option?) while you click the secondary button.