noun
Refers to the cost of a train ticket or the money needed for a train ride.
東京までの電車代はいくらですか。
How much is the train fare to Tokyo?
交通費 is a broader term for transportation expenses, including train, bus, taxi, etc.
Compound of 電車 (densha, 'train') and 代 (dai, 'fee' or 'charge').