1) Did you install Clover to your HDD/SSD? You need to install clover UEFI only, then in the BIOS add EFI/Clover/Cloverx64.efi as instructed in the guide step 14.
2) Yes, graphics issue. In Clover config.plist, add fakeID IntelGFX = 0x04128086 under devices. Use Clover Configurator to do this. Much easier.
3) Intel Wireless is not supported, need to be replace. Ethernet and Battery status is not working could be you didn't do step 14, installing kext with HVT