can i replace this and boot myself

When I am driving at night the back light are not on unless I hit my brakes, The lights on the dash board is out also. The head lights work, hazardous light work, turn signals work. One mechanic said it was an electrical problem and would cost $1000 or more to fix. Another mechanic said it was a switch. One mechanic checked all bulbs. Please help cannot afford to buy another car.

When i start my car i cant put it in reverse the button is locked i have to turn my weel from left to right for it to un lock n go in to reverse

My daughter-in-law pulled in the garage turn the car off Went to go to work the next day car will not start has spark and has fuel tried ether and is not even trying to start checked all the fuses tested all theall the relays they're opening closing just fine pulled the spark plug wire out put a screwdriver and it has good spark what do you think it may be

I have replaced the timing belt cleaned out the mass air flow sensor

Its getting gas. Its not getting a good spark, orange spark now.

O2 sensors in tact. Wires look good. Have not checked resistance in the wiring yet.