After I open Numbers and click New Document, it wants me to select a template. I need a blank page like what's in TextEdit but I don't see one. I just have a list of addresses that need to be sorted alphabetically by street name.
You should be able to scroll down the list of templates in Numbers and find the Basic - Blank template. Just use that one. Don't worry about the gridlines—they will not copy over to TextEdit, if you use "Paste and Match Style" when you paste your data from Numbers to Excel.
The bigger problem with automatic sorting is that it will sort on the first characters it finds on each line.
For example, if your text reads: "123 S. Main St.", it will sort on "123", not on "Main St." If you want to sort on the street name ("Main St."), you will need to take a different approach.
To properly sort, the computer needs to know what the street names are and what the text format is. Each address also has to follow that specific format. If your addresses contain mixed formats (such as if your address book contains people from different countries), it will not work.
Also, if the names are mixed in with the addresses, Numbers (or any app, for that matter) will not magically find the street addresses and sort the records for you. It will sort everything.
As an example, let's say you have this list of addresses in TextEdit:
123 N. Main St.
456 S. Birch Ave.
14935 W. Lotus Way
If you copy and paste into Numbers as-is, you will get this:
Not too great, right? You can adjust the import settings in Numbers to "delimited" to make it look more like this:
...which is more like what you want.
However, you still have to tell Numbers which item to sort on, and Numbers has to figure out what you mean.
How many addresses are we talking about?
It might be easier if you created a new address book in Numbers with the proper name and address columns. Then you could sort much more easily. If you have a lot of addresses all in different formats, though, it's a lot of work.