I have absolutely no idea what I am doing.
Pssst. You're typing a message to the forum. Well, you were, anyway.
I have looked around the forums a bit and to be honest a lot of this is another language to me.
Agreed. Just look at all the foreigners trying to make "robot car fire" and stuff like that. Makes no sense to me.
Is there any advice that you can give to steer me in the proper direction?
Given a choice, go straight. If that doesn't work, turn right. If that doesn't work, turn left. If that doesn't work, back up.
I'll give a bit of background on the project:
Oh, good. I was wondering when we'd get to that.
The light will have to take a strong led for a bright flash
A bright light and a bright flash are not the same thing. You assume that we know what the light is for, but that seems to have been omitted.
The device needs to be able to emit a tone
Then, the device needs to be a speaker. The Arduino can't emit a tone. Though it can make a speaker do so. How far away that tone will be audible will depend on exactly what components you end up with.
It should be able to be selected Tone, Flash, or Tone & Flash
Using what? One switch for tone, one for flash, and one for both, or one that cycles? How will you know which mode it is in? How will the device know when to flash, squawk, or both?
What is the purpose of the flashing and squawking?