Hi Kumer, and welcome to the forum. The last picture shows a purplish stamp. It is an American coil stamp from around the sixties and shows a picture of Abe Lincoln. The rest I can not help with, the pictures are too small. When I have one I can not ID I use www.stampworld.com
The last stamp is from Dahomey (now Benin), the stamp above it is from Yemen Arab Republic (YAR). The top block of four I think is from Argentina, the stamp below it reminds me of a stamp from Trinidad & Tobago, but is very blurry. None of the stamps shown are valuable.