The Verdict: Not eligible
Canada does not sell citizenship, so there is no passport to buy. An investment can buy permanent residence in Quebec, and citizenship can follow after three years living in Canada.
Every way to become Canadian is by birth, descent, adoption, living in Canada as a permanent resident, resuming lost citizenship, or a rare discretionary grant. None turns on money.
If residence first is acceptable, take this quiz again and choose residency. The Quebec programme requires spoken French and a year living in Quebec.
If what you want is a second passport without moving, Canada does not offer one.