Email Marketing Recipients

Hi, I have a campaign, and I want to add some recipients to use the email marketing section and send some mails and info.
But I want to select some contacts using a filter, and select many and not one at a time.
Also I want to add some Leads, is there a way to include leads and not only contacts?

For me the most important is to include Leads, Contacts, and select many at a time and not go one by one.

How can I do it?
 
Thanks