SonSurf Beach Bash
Yes, if you bought the kit, then you may use the music and logo.
BUT don't overwork!
First, look in your kit for the CD-ROM in Beach Decor and More. This contains lots of logos, clip art, etc. all ready for you to use. There are also downloadable clip art pieces and music samples on the myvbsparty.com site.
AND you might want to check here on this forum or on myvbsparty.com for Chad Pace's already complete VBS website customizable for your church! It contains everything you are asking for! You might discover that a lot of the work you're anticipating has already been done for you!