1) rs. 2k is too less a budget for any PCI-E x16 GFX card. u'll have to raise ur budget to minimum Rs. 3.5 k, but i suggest rs 5k
2) check out headphones from iBall, Zebronics or intex in that range. u should get decent headphones, but nothing special for gaming. no chance of getting logitech or microsoft headphones in that range. branded headphones form logitech and microsoft will cost min. Rs. 1k. philips headphones are available Rs. 600 onwards
3) Headset comes with hearing unit + microphone
Headphones are only hearing units, no mic