I cannot turn ipad on to get serial number in settings/do not have original package either.what can I do now

Patience. This is a user to user forum. We are ALL volunteers helping users.

See this link and you'll see the following section towards the bottom --> Find the serial number or IMEI on your iPhone, iPad, or iPod touch - Apple Support

If you don't have your device

There are several places to check that might show the serial or IMEI/MEID number.

1. Go to appleid.apple.com in a web browser.
2. Sign in with the Apple ID that you use on your device. 
3. Choose the Devices section. To see the serial and IMEI/MEID number, select the device.

If you still need help, here's what to try next:

• Do you have a different device with iOS 10.3 or later that's signed in to your Apple ID? On that device, go to Settings > [Your name]. Scroll down to see any devices signed in with your Apple ID. To view the serial and IMEI/MEID number, tap the device name.
• Do you still have your device's original package? Find the serial number and IMEI/MEID on the barcode:
• 
• Still can't find the number that you need? Contact Apple Support by selecting your device from this list:
  • iPhone
  • iPad
  • iPod touch

The Apple Support Communities are not a “chat room” where you might expect an instant response, but are instead a “forum” where you post a question - and then wait for a contributor to reply.

As to your question, you can find your device serial numbers listed in your AppleID account. Just sign-in to your AppleID account from any web browser - then select the Devices tab. Here you will find the model and serial number - and for Cellular enabled devices, the associated IMEI.

Sign-in here:

https://appleid.apple.com

From the article linked above: