Can I install Rear camera, and is it possible to add after market 7 inch infotainment system supporting Android ??

It wouldn't be possible to install a rear camera in Mahindra Bolero Neo. On the other hand, we wouldn't recommend getting an infotainment system installed from the aftermarket, in order to avoid hampering or voiding your car's warranty. You may get a 7-inch touchscreen infotainment system install from the authorized service centre of Mahindra only.