Lpc2000

I have read that the LPC2119 has 5V tolerant I/O Pins.
But the datasheet is confusing me a little bit about the maximum input
and output current of the I/O Pins.
Is it 3 uA? What is the meant with "Pull-Down Current" at Vi=5V, min
10, typ. 50 and max 150 uA?

I have to design a Layout with the specification that I/O's have to
provide 5V and can be used as Input or Output. I thought about pulling
up the Pins, but what will happen if the Pin is configured to be
Output and is High. Will the 5V then take influence on the 3,3V?