You can remove the following from onboot.lst
Xvesa - not needed if you are using Xorg-7.7
wl-modules-4.19.10-tinycore.tcz - recursive dep of wifi
iw - not needed if you are using wifi
ndiswrapper - you are using wireless-rtl8822be-4.19.10-tinycore
firmware* - the one you need, firmware-rtlwifi, is a dep of wireless-rtl8822be-4.19.10-tinycore
tc-install-GUI - would be be better in ondemand.list
ezremaster - would be be better in ondemand.list
special key recognition is a function of the bios, manufacturers kernel driver and Xorg-7.7, not xbindkeys - once Xorg has recognised the special keystroke (cf "xev -event keyboard"), xbindkeys does something with the signal that the key has been pressed.