Need help understanding hooks

[BigVolDaddy]

For a newbie like myslef I tend to get lost standing in the fishing department at my local store. SO many different type hooks I don't know what to get. (Straight shank, Offset, Round Bend, Offset Round Bend, O'Shaugnessy, Offset Wide Gap, Extra Wide Gap, etc...) Can someone please break these down for me a little? Could you answer these questions for me?
1. When would I need a straight shank hook?

2. Are these all the same just worded different? (Offset, Round Bend, Offset Round Bend, O'Shaugnessy)??

3. Why and when will I need a EWG hook?

4. What size and type hook are best for Texas rig?

5. What size and type hook is best for C-Rig?

6. What shacky head setup do you like best?

7. What about Flukes? What is the best hooks for Zoom Flukes or other soft body type swimbaits?

8. When will I ever need or use a weighted hook?

thank you for all the help!!