Many of your questions can be answered in Kotor walkthrough
and the TSL walkthrough
Please consult these walkthroughs before posting your questions here--you'll find many of your questions answered there, and then you won't have to wait for answers here, either.
Also, look through the other threads in these forums to see if your questions are already answered in other threads--many of the ones you've asked in the last couple of days are questions other people have asked already. I know the search function is not working so it's harder to find some of these threads, and we understand that, but if you scan down the page you'll find lots and lots of threads to help you out.
Just play the game and enjoy it.
If you die a few times, it's OK--just reload from a save and replay until you get the hang of it. Save right before you get on the Ebon Hawk to leave Taris so that you don't have to replay too much if you get killed by the fighters.