Do I need to book flights and accommodation before my visa application is approved for Thailand?

Hi. I have a question about the visa application forms.

1. There are a few fields regarding flights -- date of arrival, travelling by, and flight no. or vessel's name. Does this mean I need a flight booked before I even know if my application is accepted/denied? Can I just put in desired date?

1. There are fields regarding proposed address.. again, do I need to book a place to stay before I even know if I'm allowed into the country or put down a desired place of stay?

1. Name and address of local guarantor and guarantor in Thailand..?? How do I fill this in without knowing anybody in Thailand? What do I put there?