Tap twice to enable capLock and twice to release. There's no updated kext (ApplePS2Controller) to fix this issue started since Sierra if I remembered it right.
No gesture with the kext I attached. Only basic 2 fingers scrolling, tap to drag and release.
Your Alps touchpad is. v7 I believe and no support for it. If you're a developer, I invite you to update it. See here for more info
F8 is for toggling screen I believe, might be different on your keyboard. But if yes, it's not going to work like Windows. Use Karabiner-Elements app to reset the keys.
See example here
https://osxlatitude.com/forums/topic/8514-dell-latitude-e7450-clover-uefi-only/?do=findComment&comment=64817