'98 4Runner loud noise when ignition turns

I tried to turn on my 4 runner after not using it for a few days and when I turned the ignition it sounded like I was turning on a monster truck. I immediately turned it off and tried again after a couple of minutes but it did it again. I don't know if this has anything to do with it but during those couple of days that I hadn't driven it snowed a few times. Please help!

Please try and better describe what you heard when you started your truck.