How to point a domain with a working website to another website and domain

So, we have had a website located at xxxx.com for several years now. Google and all the search engines have indexed pages such as xxxx.com, xxxx.com/pages, xxxx.com/pages76.

Now, on the new website, aaa.com, there are no aaa.com/pages or aaa.com/pages76.

How can I make sure those are removed from Google, or are forwarded to the new domain (just the homepage)? Right now, I just have a 301 redirect from xxxx.com to aaa.com.