There is definitely a train from Colombo to Jaffna, in fact the train track has been reinstated and modernised following the civil war. Most trains have an ac first class and non ac second and third class. I am sure there may be a daily service to Jaffna and remember the hotel telling us the return from Jaffna left very early in the morning, something like 6am. I'm sorry I don't know anything about the price but it isn't very expensive given the fare we paid for the tea country train.

Ladies, covering knee and shoulders. Gents, covering knees and when entering inside, you have to remove shirt or t-shirt 👕

yes lot of hotels at varies prices around the Nallur area

Everyday between 4.15 pm to 6.45 4.15 pm a small pooja 4.30 pm special pooja Another pooja 5pm and 6.45pm

The best way to take in the landscape and travel in comfort would be to take the fully air-conditioned train. It's only 1,500/- one way. Leave Colombo in the morning from Mount Lavinia at 5.10am or Fort Railway at 5.50am. Gets you in around lunchtime. Tickets can be got at counter No. 17 at Fort Railway station or booked online. All other trains take longer. Private Buses leave Wellawatte around 8pm for overnight travel, but personally I think they are uncomfortable with loud music and very high a/c and get in around 4am. Tickets can be got from Rolex Hotel in Wellawatte and other select eateries and cost about 500/- Helitours is a Air Force run flight service costing 14,000/- one way and is the quickest way to travel taking only about 2hrs at most. Tickets can be got at the Heli Tours office in Colombo 01