1000 INR is like 18$ right? That is very expensive for just 10Mbit, I have 100 Mbit (shared, but still has great speeds), for 10$, and no traffic limitation.
If the 10Mbit seedbox is dedicated, and it is not shared between the users than you would be able download and upload with max speed all the time, which is around 1-1.5 Mbyte/sec.
You should check your provider, what does it offer for downloading files from the seedbox, because some providers offer only ftp, but there are seedbox services where you can download directly from webUI, also they should state if they offer WebUI or not in the FAQ (most providers do).
If you want to upload something to a tracker than you should have that file on your seedbox, either you upload it there from your home PC or just download it from X site and than upload it to another one, or just cross-seed it.