[Arran]

First of all shellac and lacquer don't always mix so I would strip the shellac off and recoat it with sanding sealer. Second the grain must be filled or it will look tacky like an "Antique Mall Special'. Third, the finish an all of these sets was gloss lacquer, which was rubbed out, satin looks wrong and while semi gloss is somewhat close to a rubbed out finish it isn't a durable as gloss. I can't offer advice on what shade of toner to use, it looks like it may be medium dark walnut, the main body maybe light or medium walnut, but if you are planning to use Mohawk tone spray use one out of the 100 series.
Regards
Arran