If you do a complete reset, you will return the iPad to factory settings. I'm not sure what ID is appearing on your iPad. If you purchased the device second hand and the original owner's information is on it, you will have to ask him or her to remove the ID for you.
If you want to sign into your own Apple ID, go to Settings>iTunes & App Store>Apple ID. Tap the ID and sign out. Then sign in with your ID.