2007 Honda Accord won't start at all?

I bought my 2007 honda accord 4 cylinder used a little over a year ago and have had no problems since yesterday. I parked my car on Wednesday and didn't attempt to drive it again until Friday. When I did, the car would not start at all. No lights when I turn the key, horn won't work, no click sound, nothing. Also the break pedal is very stiff when I try to push it down. I tried to get a jump from a neighbor but with no success. What could be the issue?

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