You are asking a lot of diverse questions with only a few days to master any of the answers. Too bad you didn't "work" this website for a few months already. Much more would be obvious to you. I'll get the ball rolling...
1. what should be the best exposure for the landscape & skyscape
Use whatever your meter tells you and bracket/compensate judiciously. This is where experience pays off.
2. how to set "infinite focus" & what to focus in landscape
Given your aperture, set the focus for the corresponding hyperfocal distance. If the depth of field doesn't cover the foreground, it is better to let the distant hills go soft than the nearby rocks and plants.
3. what kind of role should i take
Assuming you mean film, most landscape folks use Velvia.
4. what is the best time to shoot landscape
The first 2 hours and last 2 hours of light - early and late.
5. my main lense do not have hyperfocal meter, so how should i guess about focus to keep foreground, midgroud & background sharp & focus
You can find charts on the web to download and printout. Google on "hyperfocal distance chart".
6. i want to experiment to make panoramas, so how should i set the exposure for panas, i will be taking it first time
Meter all scenes beforehand and the pick the one with the least exposure and take all scenes with that constant setting. Use only manual exposure settings and no polarizer.
Hope that gets you started off on the right foot. Happy sailing!