Need help using terminal to delete files

I left my camera to download a ton of photos, but now my hard drive is full and the computer froze up with an error message that the hard drive was full. I shut down last night and can't startup now. I've been trying to figure out how to get into terminal to delete the photo files, but can't figure it out.

I can get into terminal using the option key at startup, but don't know what to do next.

the files are in a folderi n the users/me/Pictures folder. I could just delete the whole folder if someone could help me.

Also tried starting up in target mode, but wouldn't. Also couldn't start up from an install disk. When I try, it just flashes from the apple logo to the null symbol.

HELP!

Thanks!