Q: How do you check what version ipad you have?  Need to also check which version of Bluetooth?

Identifying iPad models

Tap Settings -> General -> About. Should provide all the relevant information about your iPad.

You can type in your iPad's serial number (Settings > General > About > Serial Number, or on the back of the iPad) in on this page and that will tell you the model : https://selfsolve.apple.com/agreementWarrantyDynamic.do

Or you can look up the model number (on the back of your iPad) on this page : http://support.apple.com/kb/HT5452