Only the Ndsl store sells it
buy it on eBay or other internet stores
You can get them off the internet, just search buy ttds. Also it depends where you live but there might be some shops around that sell them
http://www.modpiiri.com/asennusohjeet/dstt/dstt117.zip TTDS English v.1.17 MENU
If you want to play gba games on a ttds then you need a gba emulator compatible for the ttds but i don't think there is one.
ds hobro
Yes.
nope
Curium is not sell in stores.
go to amazon.com
Yes, TTDS / R4DS are illegal, but ONLY if you use them for "ROM"s. You can apparently use them for other kinds of media, like music.
what stores sell hemclear
Most tobacconists and some variety stores will sell Zippos in Canada. None of the big stores sell them.