It's only Indonesian languanges mass there in Jakarta Cathedral. I don't think we have a mass with tamil here in Jakarta. If you would like to attend an english mass you could go to Canicius Chappel every sunday 5.30pm or Saint Theresia (but i don't know the exact time there in Saint Theresia). Hope it helps you a bit.

Hello.. I don’t know about the daily mass but I think they don’t have cause I had come on weekdays and usually empty. Sorry.. Yes, it’s easy.. you can use Taxi or grab to get here.. it’s also near to busway station.. sorry for my late reply

Over 10 million as of 2016

There's English Mass at St. Yohanes Bosco @Danau Sunter, South Jakarta, every Sunday 10.30 am.

The question is rather which church is nearest to your hotel. The cathedral will be pretty crowded for Xmas Eve mass and you need to be there few hours before to even have a chance to get a seat (likely somewhere outside the main church). Note that many catholic churches in Jkt do not offer midnite xmas mass anymore, it is more like 8pm mass or so. So depends what time u arrive, the best is to get to the nearest church near your hotel.

Yes.. so many churches with english service... Please look for it in google

6 pm

No.. because they close the gate at 18.00

Sure, they welcomed anyone who wants to visit the church. If you need guidance though, it's better if you go to the church office to ask around. =)