The question is for when you wanna reserve? As most trains open just 90 or 60days in advance and ontop not all Railcompanies haven´t published their Summertimetable for journey´s after the 12 June.
Paris - Zürich no Nighttrain just a direct Highspeed service (To save money i recommend to catch a Highspeed service just till the border Muhlhouse and from there with a regional train to Basel and further with any train to Zürich)
Direct train reservation will be up to 56€ the money saving route with 2 changes will be 10€ in advance or 20€ last minute
Zürich - Bled can be reserved via oebb.at
Here a manual how to do :)
Zagreb - Budapest no Nighttrain just a daytime Eurocity reservations can be done via oebb.at (Check the daytime manual from the link above)
Vienna -Krakow can be reserved via oebb.at similar to Zürich - Bled :)
Krakow - Prague can be reserved via cd.CZ (Czech Rail or you use the service of POLRAIL a polish ticket agency)