First, make sure you signed up to your Google account when you first set up your tab. Then, sign into your account as you've already done. Go to My Market Account. Click on the Settings Tab. Make sure you name your new device (I call mine My G Tab). Now, go back to the Orders tab. They apps will show here. Click on an app. Then, click on Installed. You'll get an option to Send to Another Device. Select the new device. Voila, you're done. It'll be sent to your tablet. I just went through this last week.
All apps will not fit correctly on your tablet, but there is a third party app that will help with resizing to the new resolution. I forget the name of this app as I haven't had a need for it as most of my 150 apps are sized just right. Search the forum and you may find that answer if you need it.
I hope this helps.