You don't need to pay to get the Homebrew channel for Wii.
Refer to wiihacks.com for Tutorials, guides, and files to get it (Sign-up required to use links).
No.
free, if you payed, you were scammed
It's not an official channel it's free. You get it through your PC.
No, the Wii can not play DVD's. Nintendo decided not to include a DVD player on Wii consoles to keep the cost of the console down. Otherwise it would cost more which means less people would buy it for gaming. Xbox360 plays DVDs. Playstation 3 plays DVDs and Blu-Ray.
No.
yes, $169.99
no, its free on the dsi shop
You can download it from the Nintendo Eshop (may cost money)
about 100 to 200
No, you can get the mii on mii contest channel for free.
yes
No it did not. All it required was an internet connection.
About $70.00