Welcome to the forums camdengirl.
Vob files are a special type of mpeg2 file found within dvd video. They are not the only files you need when burning to dvd video format however. You also need the navigation files....with an .ifo designation and the .bup files which are backups of the .ifo files.
So, we have to know if you have all of these files, or just the .vob files. If you have all of them, make a folder called Video_TS and put all of the .vob, .ifo and .bup files within it. Then use ImgBurn to burn the Video_TS folder onto a dvd. If you don't have the settings correct within ImgBurn for dvd video, it will ask you if you want to correct them. Let ImgBurn do this correction for you.
Now, if all you have are the .vob files, you will have to reauthor them into dvd video format. This can be done with no loss of quality. Download a program called DVDFlick. Use all of the vob files as your input and let Flick build a new dvd for you. Then burn with ImgBurn. Both DVDFlick and ImgBurn are free to download and use.
I normally combine the vob files before importing them into a program like Flick, but don't remember offhand if this is absolutely necessary. If you have any issues with importing the vob files, combine them into one mpeg2 file using Vob2Mpg (in Vobset mode, not IFOMode), then import this one big mpeg2 file into Flick. You can find Vob2Mpeg here. The free version works just fine.
Edit: Vob2Mpg expects to find vob files within a Video_TS folder, so if yours are not within such a folder you should put them in one. Its easy to make a folder and give it this exact name.