If the lid gets broken, you will most likely be buying a new toilet as finding a replacement toilet tank lid that fits properly is unlikely.
If you are unable to loosen the connection, use a wrench or a pair of pliers.
Some covers just twist off, so try turning the caps counter-clockwise first.
The bottom of the toilet will likely have wax from the seal, so you should not set the toilet on anything cloth or anything that you wouldn’t want to throw away.
You will probably need a second person to help you guide the base so that the bolts fit through the holes on the base of the toilet. Lower the toilet and then apply firm downward pressure on the bowl. The wax ring should mold to the base of the toilet to form a good seal and prevent sewer gases from escaping.
