The leading coffee-house franchises in North America are Starbucks (in
the U.S. and Canada) and Tim Horton's (in Canada).   What are the
average franchise-plus-startup costs to open a Starbucks or Tim
Horton's franchise...and...what is the range of their suggested or
usual, "average" net profitability of both of those franchises?

From the Starbucks website

Q: Does Starbucks franchise?
A: No, Starbucks does not franchise to individuals. However, in
situations in which a master concessionaire or other company controls
or can provide improved access to desirable retail space (such as an
airport), the Company may consider licensing its operations to such a
company.