I would first make sure the lamps are the correct ones for your vehicle.
There is a headlight out. The brights are sometimes a different bulb than the lowbeams.
You need to replace the bulb in your lights. The dim lights and bright lights have different bulbs.
Yes you will need a headlight replacement even if it is only the brights that aren't working. There are times when you need your bright lights so don't delay in getting a replacement.
Check all your grounds. Battery to block and your headlight sockets.
look where the turn signal switch is and pull it back towards the steering wheel, that turns on the brights
Check your wiring, but it is most likely the relay that selects bright or dim or a fuse.
pull up on the turn signal lever,check the bright lights relay,check the bulbs & wiring. etc,etc,etc
Yes, super bright LED lights can be bought online. You will be able to find them on places like Amazon or Lampsplus.com
Yes
I had this same problem when I first got my 94 beretta. To switch from your regular lights to brights, you have to pull the turning signal lever towards you to switch between normal and brights.
Try pushing the lever away from you, pulling the lever is a signaling function.
Check to see if the foglight switch is on. Brights (high-beams) are automatically disengaged when fog lights are being used.