Car does not start!!!!!!!!

Can anyone tell me why my car does not work. I changed the battery because the last time it didn't start, i had to jump start it. Then it worked. Then weeks later, it couldn't start again. So i gave a new used battery and it still didn't work. My volt gauge read that the battery was still good, but no lights work, nothing works. Car is compelety dead. Can some one please tell me what's up with it. Thanks.......

How many volts is the battery putting out?

Check the main fuses located in the engine compartment.

Batterys should last years not weeks, might have a draw or other wiring issues.

try turning the key.

push the clutch in too

do you have an alarm? when i swapped out my battery my alarm kept going off.