1. You still qualified but you're kinda old. You're 18 turning 19 in South Korea and that's the age most boy groups debut.
2. Depends. I know YG didn't accept TOP his first audition cause he was fat. I think you should try to exercise and get more in shape.
3. Drawing and painting have no importance to kpop companies. And when you say really good in singing and dancing are you REALLY that good? Comparable to Junsu of DBSK/JYJ? If not, you're kinda good looking, you better hope they take that into account.
4. They will decide. I know most kpop idols started out with darker skin but are visibly lighter if you compare a photo from before and after. Example: Miss A Fei:
Pre Debut: http://3.bp.blogspot.com/_nobMHGTi8_g/TDEp3a8a6sI/AAAAAAAABdE/5ksu0PjcjO0/s1600/2.JPG
Having lighter skin isn't so much of a big deal to worry about.
5. They'll have to fix it. Try doing it yourself before the audition to try looking your best. There's thousands of products that you can use. I suggest using sunscreen whenever outside and using other products such as: Exfoliators, cleansers, moisturizers, face masks, scrubs... etc. etc. etc.
6. Get an audition time and go audition. Thousands of others didn't know Korean before they went and other kpop idols like: Nickhun, Amber, etc. didn't know Korean as well. They don't talk to you nor do you do an introduction. If you're that scared, you can go to the United States auditions where they have a translator of Korean to English.
7. I choose YG then JYP then SM. YG treats trainees better than the rest... more humane I suppose. That still doesn't mean you're gonna get off the hook while being in training nor does that mean you'll be treated like a king. But the only thing about YG is that you MUST speak Korean... they say it on their audition site. It doesn't have to be fluently, but they want you to know Korean so you can speak to the trainers... plus, they don't even teach Korean in their facilities. If you don't speak fluent Korean, they'll hire an individual teacher for you. JYP is next where they treat you still more humanely than SM. Not much to say for it other than it's better than SM. SM doesn't REALLY treat you so much differently than the others... all the others call you names, act as if you're nothing, things like that... but SM is definitely the worst.
8. Do all the things I told you and practice your vocal and dancing ability.
9. Depends where you wanna audition. If you wanna audition in Korea then go in Korea, if you don't, I know there's auditions in other places. It's usually located on the company's audition site.
10. Yeah. Companies like SM and JYP care a lot about having looks. YG, even though they say they don't, they do just want you to look decent.
11. It's better to be closer than to their ideal body type than farther away, but yes. But still, try to lose weight, clear those skin imperfections and lighten your skin.
12. There are millions of others who wish the same. Even though I'm not trying to be mean or anything, just think: What makes you different from all of the others?