syncing ipad with MacBook pro

Sorry, your question is a bit confusing.

If you are trying to sync with a cable, iCloud and your iCloud account are not involved.

When you connect your iPad to the Mac, it should appear in the Finder's side bar under Locations.

click here ➜ Sync your iPhone, iPad, or iPod using your computer - Apple Support

deflumeri wrote:

I want to sinc. my e-mail address account in my mac to my iPad. When iI did so with the cloud the ipad did not get the received mail. When I used the cable method I did not see an offering to do so with the mail app. It only offered so for music calendars or whatever.

In that case the cable connection won’t do anything. As explained by AlWeir you need to setup your email account in Settings on the iPad.

Try removing the account and adding it again. It may need to be refreshed.

Go to Settings >>Apps >>Mail >>Mail Accounts. Add the email address you want that you have on your Mac.