How many items are given on an IFR clearance before taxi?
Ho ho...one of the Skills of IFR flying. Here is a typical "readback"(as I'm sure you know)....
"Cleard to somewhere airport Maintain runway heading until 800feet left turn 200 radar vectors to seal beach victor XYZ to Paradise as filed, climb and maintain 3000 expect one zero thousand 10 minutes after departure, departure frequency is 127.2 sqwark 4626".....
Very easy to write down though:
RH 800
L 200
RV SLI
V XYZ
PDZ
A Filed
3000
x10000 10
127.2
4626
Thats what I do anyway.....
Bear in mind that you could receive something like this in the air too if you asked for a pop up clearance...