Text messaging

I just purchased a new iPad. I still use my old one and also have an iPhone. I am not receiving all text messages on my new iPad but still receive all on my 2 other devices. It appears they are text messages that are not in my contacts, ie bank security numbers. In addition, the new iPad is not sending texts to android users. Also, sent couple text messages with pictures and the individuals are not getting them. So I resent and now they appear on my other 2 devices that I sent the pictures 2x. I have tried playing around with iMessages in settings and I cannot figure it out. Everything was copied exactly from my old iPad.