Expenses Operations Self Funded Capital
This is a question for your accountant and depends on the type of company - LLC, C-corp, or S-corp, and your goals for the company and yourself personally.
I believe you can just deposit money into business account and then show the money as a business loan to the company on the books, which the company can repay you when it's profitable. However, if you need to involve a 3rd party (partners, investors, buyers) at some point, the loan will be a liability and make company's financial shape less attractive.
Several of those are different questions, not options for a single question. @Webbie is right that the answer to a lot of these will depend on your situation. You should definitely get an accountant as the small amount you pay him/her will pay off in taxes saved.