What are the fees for opening a brokerage account?

Is there a minimum deposit required to open a brokerage account?

You can open a National Bank Direct Brokerage account without a minimum deposit.

Where can I find the agreements in French?

See where you can find the French version of your agreements provided by American stock exchanges.

Why are you asking me for the number of dependents when I open my brokerage account?

This information is required under the rules applicable to securities, more specifically the "know-your-customer" rule.