Approximately ten amps available at the lighter's socket. Ohm's Law thus gives 12V x 10A = 120 Watts...
That depends on the resistance (in ohms). We can't tell you the wattage without knowing that.
1 in the front
Most likely the fuse is blown, many cars have the cigar lighter and the radio on the same circut.
12 volts DC.
25
Two black and red
Check the fuse that the cigarrete lighter is hooked up to.
Normally 15 amp max
There are many brands of cigarette lighters, I'd say the cheapest, and most popular, is BIC.
Yes but they are already common in many cars, no need to make one from scratch
Watts are not deadly but it would take 12 micro-watts through the heart to kill someone.
According to the 1996 Ford Explorer Owner Guide : ( # 17 is a 15 amp fuse for the cigarette lighter ) * IN the drivers end of the dash , the fuse panel cover is visible with the drivers door open