No, you can't access any third-party apps or store, only what is available on the 3DS eStore.
Using the Nintendo eShop.
there many free apps and yes there are
There are free apps, and as long as you get the apps that are supposed to be free for free, then it is legal. If you get the apps you are supposed to pay for free by jailbreaking the iPod Touch, it is illegal.
yes you get the AR cards with the 3DS. You can get a 3ds card to play free ds games on Nintendo 3DS.
Free apps are 100% free.
You can't get free games on Nintendo 3DS eshop you need funds for games.
you cant
No. 'Free' apps means that they're free. You don't have to pay anything for free apps. Sometimes few websites do market some of there apps as free applications, but actually they are charging for them through iTunes.Apple.com
well there's over 450 apps that are free but half of them are lite apps!
no but there are a lot of free apps the entire year
You can't get free games on Nintendo 3DS eshop you need funds for games.