You want the fuse panel that's inside the car. The fuse panel under the hood is usually more for engine functions.
suggested, the interior fuse panel in your car is most likely near the a-pillar on the driver's side behind a kick panel.
The owner's manual should have some information about which fuses do what. If you don't have the owner's manual, the fuse panel is usually labeled, and there's a diagram on the inside of the kick panel you just removed to get at the fuses.
Generally speaking, the radio is on a 10A fuse by itself, as are the interior lights. The power door locks are probably on a separate fuse or circuit breaker. Check all the relevant fuses anyway.
If the fuses look okay, they may still be blown. It's sometimes hard to tell through just a visual inspection. Grab yourself a multimeter or continuity tester to check the fuses.
I suspect, however, that assuming these aren't three separate issues and instead are somehow related, more likely you have a bad or loose ground somewhere. That'll be harder to track down, so start with the fuses.