-랄 appears here almost only in the fixed frame 이랄 게 없다 'there's nothing worth calling X': 처음에는 제가 취미랄 게 거의 없었는데 'at first I hardly had anything you'd call a hobby.' It is a modest, self-deprecating move — the speaker plays down what they have. A related line, 누가 먼저랄 것 없이, means 'without either one being the one who started.' (트랄랄레오 in one line is just a nonsense name.)