In our How I Manage My Money series, we aim to find out how people are spending, saving and investing to meet their costs and achieve their goals. This week, in our celebrity edition, we speak to Star Trek actor William Shatner, 95, about his investments, living in a pick-up truck and his heavy metal band. When did you first learn about finance? I went to McGill, a really good university, and graduated with a BA in business administration. I did…