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First of all, I don't understand your questions clearly. But I will try my best to help you. Did you get your Train Pass? If not, that's good, please make sure your needs before buying any travel pass.
Eurail pass is a discount tickets that allows holder to travel freely within the selected zone within certain numbers of day (according to the tickets). For example, if you buy a Eurail Pass for 5 countries, 10 days. You can use nearly all the railway service in the selected countries in any 10 days within 2 months.
Eurail Pass is not valid for international trains (e.g. Paris to Rome) only, buty also domestics trains (e.g. Paris to Nice, or Rome to Venice)
The first thing you need to do, list out all the train journey, from which city to which city, counting how many days that you will travel on train. If you plan to buy a Swiss Pass, then you can simply forget the train journey in Switerzland and get a Eurail Pass for 4 countries.
The benefits of Eurail Pass and Swiss Pass is not the same. You can go to their website to have look on their further informartion.