Advice on ATtiny!


I am using an IR Remote to control 2 sets of RGB leds. I have an ATtiny to use as the IR receiver and output the relevant code and turn it into a case number from 1 to 44. I have a few questions that I can't work out! I have come to the conclusion that transferring the integers via I2C would be best.

1) How do connect the ATtiny85 and the Arduino to enable me to get the address and output data. Does anybody have any schematics?

2) Do I need to set the ATtiny85 to a specific clock speed? ie 1Mhz or 8Mhz.

3) Do you have any examples of the code used in order to do this?

Any help would be great!