How to get this to work?

Go here for manual:
http://manualsforall.com/500DX.html

https://www.royalsupplies.com/cashreg/110dx_Instruction_Manual_Eng_June_08.pdf Try this link to download it. Gopakumar Gopalan Google

You may download a copy of the manual from Owners Manual User Guide for Royal 500DX CASH REGISTER

There should be instructions where the paper feeds in. Usually, you follow the rollers with the paper and feed it in. Did you try google.com for you instruction manual?

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Like many other single tape tills ,it uses an EJ (electronic journal) kept in the memory

Manuals (cost)
They also do casio, TEC,Casio,Sam4s,Epson,Sharp,CAS,NCI,ApexInk,ApexCovers,ApexRolls,Metrologic,Datacap
Systems,Sanyo,Royal Sovereign,Restaurant Edge,Detecto,Uniwell,Datasym,Harbortouch and Telequip.
Cash Register Store Buy Quality Cash Registers Online at Low Prices...
Manuals download
(not free)
ADS Anker,Aster,Casio,Metrologic,Olivetti,Olympia instruction manual,Omron cash register,Royal,Samsung,Sam4s cash
register,Sharp,Tec cash register,Vectron,Walther,Wincor Nixdorf,Machine setups
Not Epson, Apex,Datacap Systems Sam4,CAS,Uniwell,Sanyo,Royal Sovereign,Restaurant Edge,Detecto,Uniwell,Datasym,Harbortouch
and Telequip.
Manuals Downloads
Manuals free view
ABC Office,AMD,AVE,Casio,Delta,Ele,Epson,Goodson Imports,HP (Hewlett-
Packard),Lexmark,Mars,Olivetti,Olympia,Olympia/Luggage,America,Pelco,Philips,POSIFLEX Business Machines,Radio Shack,Royal
Consumer Information, Products,Sam4s,Samsung,Sanyo,Sharp,Sony,Toshiba,Unitech, and Weider
Free Cash Register User Manuals ManualsOnline com

GO to printing options and select choose 1 where it asks to print or not the tax incl

Replace the paper

Manuals (cost)
They also do casio, TEC,Casio,Sam4s,Epson,Sharp,CAS,NCI,ApexInk,ApexCovers,ApexRolls,Metrologic,Datacap
Systems,Sanyo,Royal Sovereign,Restaurant Edge,Detecto,Uniwell,Datasym,Harbortouch and Telequip.
Cash Register Store Buy Quality Cash Registers Online at Low Prices...
Manuals download
(not free)
ADS Anker,Aster,Casio,Metrologic,Olivetti,Olympia instruction manual,Omron cash register,Royal,Samsung,Sam4s cash
register,Sharp,Tec cash register,Vectron,Walther,Wincor Nixdorf,Machine setups
Not Epson, Apex,Datacap Systems Sam4,CAS,Uniwell,Sanyo,Royal Sovereign,Restaurant Edge,Detecto,Uniwell,Datasym,Harbortouch
and Telequip.
Manuals Downloads
Manuals free view
ABC Office,AMD,AVE,Casio,Delta,Ele,Epson,Goodson Imports,HP (Hewlett-
Packard),Lexmark,Mars,Olivetti,Olympia,Olympia/Luggage,America,Pelco,Philips,POSIFLEX Business Machines,Radio Shack,Royal
Consumer Information, Products,Sam4s,Samsung,Sanyo,Sharp,Sony,Toshiba,Unitech, and Weider
Free Cash Register User Manuals ManualsOnline com