Huge creatures like the bijuu would'nt be able to get away fast enough in the time it took Madara to deal with Tobirama,second he would've still hunted them down or prevent the bijuu from escaping by using techniques like the Uchiha barrier.There is nothing Tobirama could've done that would change the outcome of what happened.The time Tobirama fought Madara, Gaara had time to escape:You must be registered for see linksIf he intervened sooner, it's the Bijuus who would have escaped