How much will the taxi fare cost ?
It will take approx 1 hour for the trip. Its in the middle of nowhere so on the outbound trip you will need to use the fixed rate at the cruise terminal, and on the return expect to pay more than the meter as the driver will travel empty back out of the terminal.
One utama probably reduce your travel time by 20-30%.
If you are looking for shopping mall to go to there are others which are closer.
You have the bukit tinggi Jaya Jusco, and Bukit Raja Jaya Jusco.( Klang )
Next up Paradigm Mall.( Kelana Jaya )
Then you reach 1 Utama Mall.
If you want something nice, I would recommend Sunway Pyramid. No need to go all the way to 1 Utama.