I need to take HSR to Tainan how far is the station? Aso average cost of taxi from the airport to hotel?
HSR is about $7-8 US dollars ($1=NT$30) about half hour taxi ride. Airport to hotel cost you about $40.
From Airport that you can ride the MRT to Taipei main station for about $5 USD. Than take MRT (red line) and about the 7th stops at Zhishan off for $3 USD. And take taxi to hotel only 4-5 traffic lights for $3 USD- because you carry luggage otherwise you can walk and shopping for 20 minutes to hotel. And bus at front of hotel take you to Zhishan MRT station only 3 stops and cost $50 cents USD. Than you can go to Taipei main station and get on HSR to Tainan- super easy.
We asked the Hotel to arrange a car to the Airport and the cost was TWD 1,000. I think it's a bit higher for the opposite direction from the Airport to the Hotel.
We usually took Metro to Taipei Main Station and have no idea how far the Station is from the Hotel.
Get an answer from Dandy Hotel - Tianmu Branch staff and past guests.