Start with a simple till and switch features on as you need them: deposits, appointments, tables, stock, work tickets and more.
Products, cash and card, receipts and cash up. Nothing else until you want it.
Deposits, appointments, tables, stock, serial numbers, loyalty: each a switch in the back office.
Connect your card provider, or keep the machine you have and key the amount in.
One till in one shop costs nothing, for as long as you like.