you sound a bit like me lol..
1. my PBSM attendance was fairly ok..i went to the meeting but never held any poitions or anything.
2.i was an interact club member and was holding a vice-secretary spot.
3. i was a school prefect.
4. i entered a few essay writing competitions.
5 i took the new south wales english exam and got credit (it doesn't count towards your koko marks)
6. i have went for plkn


for your koko questions:
1 & 2.i don't think its too late for you..if there are any activities being held by other clubs try entering that.look out for competitions like quizzes and such. when you aplly for IPTA online they will ask for your KOKO marks.so it's good to have a good grade in your koko.

3.when i went to PLKN all they gave me was a cheap certificate and nothing else.so when i was filling up the IPTA application after finishing my training i had nothing to show that i actually went to plkn. they did not give me any marks or anything that can be used to fill in the plkn section on the form..try asking your teachers about the marks, and how plkn can help when applying for IPTA when you dont get marks after going through training.

4. they count koko marks for all 5 years of your secondary school.they have a system on how to count marks.you should be getting a buku penialaian kokorikulum from your school so that you can keep track of your marks.

5.i'm not sure about this.i did quite ok in SPM and yet i did not get a place in IPTA.i don't know what factor made me not get a place in IPTA..u.u


uni questions:

1 & 2. im not sure about this since i'm not taking medic..good grades can only bring you so far.it depends on luck as well.

3 &4.i dont know.. im not in matrics.