The short answer is no, you cannot read Borders books on Kindle. If you see an advert by Borders stating that you can read their e-books on any reader, they are simply lying. The ebook would need to DRM free (no rights management) and would then need to be converted to azw or mobi format. But if it has DRM as most books do, you cannot convert them.
The purpose of the Kindle is to allow the owner to read books. So, yes, you can read books on the Kindle.
No, only from amazon.
yes you can but you have to download kindle for PC
Yes, you can read Kindle e-books on a PC by downloading the Kindle app for Windows. This app lets you access your Kindle library and read your e-books on your computer.
The Amazon Kindle allows you to read Kindle books. These can be purchased directly from Amazon, and they are now available in a variety of colors to choose from.
yes
yes
No
Yes, you do have to buy the books on a Kindle so you have books you like. But you can get free books on there too. But they are not all the books you may read.
Depends whether you can read Urdu.
Kindle has the cloud reader lets you read books without having a kindle e reader. Kindle has free and discounted books that you can download and read.
Kindles can read most e-books that are in supported formats such as Kindle (AZW, MOBI), PDF, DOC, HTML, and TXT. However, books with certain digital rights management (DRM) restrictions may not be compatible with all Kindle devices.