Do you need a software for Thermal printer?

No, thermal and line printers are two different things. "Line" printers are referring to a form of "Dot-Matrix" printers. "Thermal" printers burn a special paper to form characters and symbols.

Printers use printer drivers which are specifically written for each printer model to communicate with computers. I.E. if the printer is a print, copy, scan, the driver must be able to handle all the...

beacuase we want print all things for example picture and so on

Without it we cannot do any work on a computer. In simple terms, it makes the hardware come alive.

Because the computer needs the software to work. With out OS we cannot operate the computer. So we need softwares to run the computer. All the software can be downloaded and installed in computers...