Vivo Mobile India — Technical support required for my Android Vivo Y83 Pro mobile no. [protected]

(1) On running Spyware/Malware App, the following 7 Apps were shown as Suspicious Apps:
WhatsApp / Google Play Store / Contacts / Messages / Chrome / Facebook.
(2) On running another Spyware App, the following 5 Threats were shown:
Easy Share (Android Trojan/Malware) /
iTheme (Android Trojan/Malware)
LockScreen Service (-do-)
Photo movie (-do-) / Browser (-do-)
(3) How do I protect the phone with a PIN lock?
(4) How to DISBLE LockScreen notifications?
(5) How to Lock individual Apps?
(6) How to Lock individual Folders?
(7) How to encrypt GmailAccount on Android phone?
An item-wise reply, serially, will be very much appreciated.
Thanks / Victor D'Souza