All system updates for the Nintendo DSi are provided free of charge.
No.Unless someone gives it to you.
If somebody gives you it as a gift example your friends, relatives or anybody else gives it a 2 u as a gift.
You can't get a free DSi from a store, BUT you can get one from compotitions on the internet or from a magzine so watch out for compotitions!
Go to System Settings. Go to page 4 (to the far right) and tap System Update. You will need an internet connection. Follow the instructions to update the DSi.