Retail Software

Guys, im about to open up a retail showroom in select city walk mall, saket, delhi.

it ll be a retail sale showroom...
i need your support and guidance for purchasing the correct software and hardware.
I want a bar code scanner, a printer (for printing bills), a display device(monitor), and of course a system to handle these things.
this is one alternative...the other alternative is to have a small system and a small printer setup..(just like u hv in costa coffee and all....)
what do u guys suggest me .?
And on your suggestion pls guide me...about rates, model number etc. etc..!.


thanks in advance

manan