stock market invest trade forex money

Hi All, I'm very very very new in investment in share. Anyone here can teach what are the important knowledge before start buying ???
1. Valuation - How to calculate it ???
2. Profit/Loss annual report of a company.
3. Where to get the latest news ???
4. How we know whether the company share was under value. (Under value means what ? Izzit means that the company was investing some project so they under value their price so can get more capital ? And the company share will rise in some time if their project lauch ?)
5. How to judge whether the share will rise/loss ?
6. When is the good timing to step in ???