How do i put the itunes card i bought on my tablet

Go to lost password in itunes have then send you a recovery email. If you just bought the tablet second hand then you may need a factory reset. If you do not have an apple i tunes account you will need to set one up as well.

i don't think so

you cant put a game on a usb card,it has to be installed on the tablet

If it's Android, hold down Power and up or down volume. You will be presented with a reset screen. Use up/down volume to show options, and power to select.

Change your apple id that way the people who took the card can't use it they would need your apple id to do so

you need to buy an apple itunes voucher in a shop or online to load your apple ID account.
If you already have an Apple ID that you use with the iTunes Store, App Store, iBooks Store, or Mac App Store, you can redeem your gift card without using a credit card.
Redeem your code on iPhone, iPad, or iPod touch

1. Tap iTunes Store, App Store, or iBooks Store on your device.
2. Scroll to the bottom of the Featured section and tap Redeem. You will need to sign in with your Apple ID.
3. Tap "You can also enter your code manually."

Apple and iTunes Gift Cards Apple Store
Redeeming iTunes Gift Cards and content codes

hi if it's ipad you need download and install Itunes to your pc/laptop Apple United Kingdom iTunes Download iTunes Now then connect ipad to pc, run ITunes and it should detect your tablet you will see it in the right upper corner. Click on it and you will be taken to the summary tab where you will see restore button. click on it and follow the instructions and your ipad will be restored.

In itunes in the top left hand corner click on you account name and log into your account then when presented with your account information click on the edit button next to your payment information and you will be able to update your credit card information. Hope this helps.

You should use sth like Salling Media to sync your Android device with your iTunes Library. Find it here: http://www.salling.com/MediaSync/windows/