@sneha_vik As noted above, when asking questions like this, it helps to specify your model. The keyboard layout you describe has been rolled out by Dell over the last few years on an increasing number of models. Previously, Home/End were triggered as Fn+Left/Right, but that was removed when Home and End were moved up to the F key row. This has prompted many complaints over the years since that change started to arrive, and recently on the XPS 13 9310, Dell introduced a firmware update that once again allowed Home/End to be activated via Fn+Left/Right, which was nice because that kept those keys near PgUp/Dn as well. So if you haven't already, try updating your BIOS and then try that key combination. If that doesn't work, then there's no way to achieve your stated goal using the built-in keyboard on your particular laptop. The Fn key combinations can't be customized by the OS or applications running within in like other keyboard shortcuts can because the OS does not see the Fn key directly. It only sees the single key result that the system passes up after you press Fn and something else. And since Dell doesn't provide any firmware-level mechanisms for customizing Fn key mappings, you get what you get -- although in fairness I don't think other laptop vendors offer that customization either. The closest you can come here would be to use an application like Autohotkey to map some OTHER key combination that doesn't involve Fn to the functions that you currently can't use with your Fn Lock in one state or the other, but then of course you run the risk of creating a keyboard shortcut collision with something else in the OS or a particular application.
@sneha_vik Some people use the number pad if they need to enter a lot of numbers, like people who work in finance/accounting. But it sounds like you will need an external keyboard in order to use your system the way you want to. Or of course a different system. Based on the layout of your system’s built-in keyboard, there is no way to get that system’s keyboard working the way you want to use it.
