car wont start

Hey , i drove my car to work today and on my way back home my car would not start , the in dash llight turn on but when i try to start the car , they go dim, and all i hear is a " click " click" i have 80k on my 95 galant v4 , I also tried jumpstarting but it did not help.. i also tried to keep my headlight on while starting, and the headlight turn off when i try cranking. Did i mention its really cold too, but my car has never done this b4.. any help will be appreaciated
Please help Me :(
khan

extreme cold can discharge a battery to the extent that a jump wont help you need a charger.

Check the battery terminators for looseness and corrosion. Give it a whack or 2 using something blunt and hard. If jump starting does not work. Make sure that the car you are using has the same voltage (V) and current (A) rating.
It also might be your battery, mine died yesterday after months of having to jump it and charge it.

Get your new battery at walmart instead of a dealer. It'll come with a 1 to 3 year warranty and only cost $30 to $60.

ok, i tried cleaning the terminators, and it did start, but then when i brake the lights in the dash go dim, and when i accelerate its normal again???
any idea why its doing this?

ok, i tried cleaning the terminators, and it did start, but then when i brake the lights in the dash go dim, and when i accelerate its normal again???
any idea why its doing this?

Try checking your battery, it might have some dead cells already. If the battery is maintenance free buy a new one. The probable reason why your in dash lights go dim when braking is that the battery is no longer in its normal operating current and voltage, when you hit the brake pedal the battery supplies energy to your brake lights decreasing the energy supplied to your in dash lights.