How do is shop online at the Tarentum super center and have my purchases ready for me so my sister can pick it up because I'm currently in hospital...

Walmart.COM. order online and select store pick up instead of delivery.

Usually they request for your ID or the card you used to purchase when you go to pick it up at store. You would have to sign up and make an account through Walmart . Com and then you can make your purchases online. Just make sure to select store pick up option at checkout.

Go to Wal-Mart's site order what you need and there's a place at checkout that says In Store pickup choose location.