um, help please (messed up render)

yeah, i’m new to blender and i’ve been having a bit of trouble on my first projects. i really don’t want to quit, but this is rather frustrating.
so i’ve been modeling a chevy camaro and the model itself looks good (by my standards), but when i render it, it gets all messed up and i have no idea why or how or what. someone please explain this to me and how to fix it.

edit mode: https://www.dropbox.com/s/caf30ztwhdlm8le/camaro(edit).PNG
object mode: https://www.dropbox.com/s/7w2oi1jgbd0t4yd/camaro(object).PNG
render: https://www.dropbox.com/s/jgh7zvsokalpzs5/camaro(render).png