no minimum unless your brokerage has minimum requirement. In america, lowtrades is the cheapest? In canada i think they have ameritrade and td waterhouse(they are merging soon).
If you take specific stock advice from anyone on this forum you are going to lose money. Buy a decent fund and add the same amount to it every month.
Unless you do plenty of homework you are going to lose money buying individual stocks. If you aren't prepared to do the work (research) paying for GOOD advice is the way to go.