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.
25
Two black and red
12 volts DC.
Check the fuse that the cigarrete lighter is hooked up to.
Normally 15 amp max
Watts are not deadly but it would take 12 micro-watts through the heart to kill someone.
Yes but they are already common in many cars, no need to make one from scratch
There are many brands of cigarette lighters, I'd say the cheapest, and most popular, is BIC.
1,200