Hello Sir/Snr.,
I see a lot of suggestions already. Let me refine a few points:
a) If you are ever going to do gaming on this monitor, you need at least 144Hz, (1080p plus 24 inch) or (>2k pixel plus >27 inch mandatory) <-- don't try to compensate for this combination, you will thank me later. And can go beyond based on your budget. If no gaming then 60Hz or sometimes ~100Hz
Price: Lower the spec, low will be price obviously. Range: Rs. 10k to 30k for spec mentioned above.
b) from my research every headset has its cons for e.g. we will get ear pain no matter how soft it is, so whatever fits within your budget goes for it. I'm using Jabra, try if you like this one. Range: at least Rs. 2.5k to 10k
c) Again if you are a non gamer go for reputed brands like dell, hp etc. budget: (Wired/Wireless) mouse->Rs. 500rs. to 2k. If you want a gaming mouse/keyboard or the one with rbg colors and extra configurable buttons, you may need to spend a little more.