my dad said reading this book made you an intellectual (he never read it, don't think he planned, too (although he no doubt was an intellectual)... i've been stuck somewhere around page 700 for several years now (but it's excellent))
Your dad were right...and wrong, one of 'my' book, like lot of great literature, (Conrad, Dostojevski, etc,) one probably would needs a life for studying stuff like Wittgentstein, Schoenberg, Freud and Einstein's theory to fully understand Musil, but it's an enjoyable reading anyway.
About my readings, I started with Stevenson, Steinbeck, Salinger, plus Emilio Salgari (Did you english speaking guy hear of 'Sandokan'?).
I had plenty of books in the house, so I just picked the ones I was interested since I was 10 y/o, basically 'adult' books.