Just want to add :
- the direct Paris - Barcelona TGV has a 37€ booking fee. If you want to take this train book it ASAP as some dates in July and August are already sold out
Alternative (a bit longer, more scenic and way cheaper) : schedule is an example.
- TGV Paris - Montpellier/Narbonne/Perpignan limited 10€, then 20€ 06:48 - 11:56
- TER Montpellier/Narbonne/Perpignan - Portbou 12:55 - 13:47
- R Portbou - Maçanet-Massanes 14:35 - 16:04
- R1 Maçanet-Massanes - Calella 16:09 - 16:36
Book TGV within France here : https://travel.b-europe.com/Eurail-GE/en/booking-tgv#TravelWish
Metro is never included.
Calella is on line R1 of the Rodalies (suburban and regional trains in Catalonia) and is operated by Renfe so your pass is valid.
You can find the timetable here:
https://rodalies.gencat.cat/en/horaris/
Some stations have gates and you may need to ask staff to open them.
In and around Barcelona, Renfe operates R1, R2, R3, R4, R7 and R8. Other (sub)urban lines are not operated by Renfe. See the map here:
https://rodalies.gencat.cat/web/.content/00_home/04_mapes/mapa_rodalia_barcelona.pdf
Thank you so much - Thats very helpful !