Well when i try to put a movie to my timeline it says stream attributes could not be determined, one of the only video files ive noticed it play has been a video file from 3ds. thats it
Where was the video file captured from or originated? If you used a proprietary codec, Vegas won't be able to read it, altho that's fairly rare.
Studio Max can output any number of file formats. What you want is an avi that's either uncompressed, or uses the Microsoft DV codec, or the Main Concept DV codec, or the Canopus codec for the easiest use. You can also output sequential TGA's which look great, or 32 bit avi, which contain an alpha channel.