Trying to author DVD with Toast 10 Pro

[Teachable]

Hi! I pray that you can help! Toast "technical support" didn't!

Question 1:
I have an iMAC 10.5.8. I produced a show in Final Cut Pro 6.0.1. I'm ready to author a DVD. I set my in and out points, exported to Quicktime Movie. I took it into Toast and burned the DVD. When I play it back on a DVD, it is HOT! It is way to bright! PLEASE help!

Question 2: I see in one of the answers that the program has to be converted to mpeg-2. Is Quicktime mpeg-2? If I have mpeg-2 on FCP, I don't know where to find it. That was question from several years ago. Is there a better one in 2009?

Question 3:
I want the highest quality DVD I can get. Is Toast 10 Pro what I should use?

Thank you!