Originally posted by DeadMilkman:

I am having this same exact problem. I have done everything mentioned above but F5 is still not bringing up the console. I do not want to use mods.

EDIT: I found by pressing Shift F5 brought up the console.

Thanks for the responses everyone. Similar to you DeadMilkman, I ended up using Function + F5 and THAT finally brought up the console.