1. The treehouse had a ladder for the kids to climb up into it.

请问加粗部分是不定式复合结构吗？充当定语？it有没有问题，是多余的吗？

2. I am going to host a launch for my new book to attract attention to it, and hopefully I’ll also sell a few copies.

请问加粗部分是不定式复合结构吗？充当状语？