Please review Installation Instruction Sheet https://img.acuitybrands.com/public-assets/catalog/565316/installation-sheet-for-boomerang.pdf?abl_version=02%2f27%2f2020+15:03:38&DOC_Type=Installation_Instruction_Sheets
If you grab the diffuser (the plastic cover) and squeeze (push the center in with your thumbs), the sides (long edge) will flare out and you can lift it up and the metal housing plate that is mounted to the ceiling. Lift it over one edge and then the other. I hope this helps.
Please review Installation Instruction Sheet https://img.acuitybrands.com/public-assets/catalog/565316/installation-sheet-for-boomerang.pdf?abl_version=08%2f29%2f2019+06:41:46&DOC_Type=Installation_Instruction_Sheets
In This particular light fixture you do not change the led light bulbs because the led lights are integrated therefore, you will need to replace the fixture.
will need to install a junction box.
Yes. You need to purchase an LED compatible dimmer.
Not sure, but I love the light. Check the specifications or contact the manufacturer or dimmer information, I didn't install a dimmer.
If you were to be anchoring it to the studs maybe, but I wouldn't rely on toggle bolts to hold a light to a wall. Depends how you are anchoring it really.
Yes they will.