Hi,
If you get question marks instead of the € symbol, it might be because your email server is sending emails in UTF8.
It's hard to say exactly what could be the solution though to make it work properly.
For the EUR text, you have several solutions, but the simplest would be to remove the space you have between prices and the currency by turning off the "Symbol and positive value space separation" in the options of your currency, via the menu System->Currencies.
Otherwise, you would have to edit the code of the emails and add some no-wrap inline CSS. But it's more difficult, especially with the starter edition because you don't have the Email edition interface which is only in the Business edition.