You unequipped your wand or you changed it correct?
Look at you backpack and find your old wand. Young wizards are provided with a school wand that give you one of each of the weakest attacks of each school. As you level, you change wands which no longer give you the starting cards but the advanced minors. These are helpful because they get rid of your enemies' shields and boost in your school's favor. You can insert treasure cards into your deck by selecting them in the treasure card sections of your spellbook. You can not view the treasure cards however unless you discard some cards and click "Draw" on your battle screen. Treasure cards are used for emergency cases and draw them only when necessary.
You're just starting out on Wizard101 so no worries, you'll get used to all the quirky features :)
You can check out your clothing and item's stats by rolling over them in your backpack. Remember: your wand gives you those cards