for printing business mailing labels, how do I include the persons title as well as company name

You can use the Prefix field to include things like "Dr.", and this will appear on the label.

I do not see any automatic way to include Job Title, but if you don't have too many to print you can do a kluge by putting the job title in the first line of the addres, then return, then the real first line. This will print nicely. But is work putting it in.

In the App Store type mailing in the search box, select mailing lite, and you will get some to look at.