Looking at the pictures you provided, those wired devices, aside from the keypad, can be used with an IQ Pro.
You can also use something like the IQ Panel 4 along with an IQ Hardwire PowerG, which converts them into a wireless signal that the panel can receive.
The IQ Pro and IQ Hardwire PowerG both have a siren terminal, so you can use the siren that was installed as well.
Steps for getting started with an IQ Pro can be found here:
Steps for getting started with the IQ Panel 4 and IQ Hardwire PowerG can be found here: