Electrical problem on 91 Honda Accord

1991 Honda Accord, mileage: 167,000. I have a 91 Honda Accord, manual. It will not crank over when I push down on the clutch, I'll just hear a click sound everytime I turn the ignition to start it. Yesterday it was starting with no problem but once I turn on the parking lights and headlights my engine will struggle to stay on and then die on me. And 30 minutes before that, when I was driving, my engine will start losing power after 3,000 rpm's in 1st and 2nd gear and my rpm's will jump between 3,000 to 3,500 very fast back and forth but had no problem in the rest of the gear's. Now since my engine won't start, my parking lights and headlights won't turn on everytime I turn the switch but my oil light will lit. They'll be time's when my Check Engine Light, Battery, and Oil Light will be on but very dim. Also, when I turn the key to the II part of the ignition, my battery and oil light will lit but my emergencing brake light will be dim, since my emergencing brake is up, and the light that show's my door is open is very dim and my fuel pump will turn on for half a second and turn off. Months before this, everytime I tap the brake my headlights and interior lights will dim and I'll lose power to my radio for a second. My battery is only 6 months old and had my ignition and distributor replaced a year ago. What are the posibility's to this cause?