I have heard there are troubles of more than one kind. Some come from ahead and some come from behind. But I've bought a big bat. I'm all ready you see. Now my troubles are going to have troubles with me!

This quote means that the speaker is facing a difficult situation. They are determined to overcome what is holding them back and are taking action to make sure they succeed. They have bought a big bat, which is a metaphor for their determination and readiness to face whatever is ahead of them. They are telling their troubles that now it’s time for it to experience the consequences of trying to hold them back.