Not needed na, NBI lang.
1. What do you mean contact hours? About 20-25 hours a week of school.
2. If you have a two year course, you just file a piece of paper lang before summer break, signifying that you are taking a break and will be back in September
3. Nope, scholarships and bursaries are only for domestic students. Discriminatory, sure, pero cash cow nila ang international studens.
4. I can't tell you if there is enough, but there are many. Depende sa tiyaga mo. You can get a part time job in lots of industries, as for demand, I don't know. Retail, restaurant work, sales associate jobs, factory work .... nasa yo yan if matiyaga ka then you'll get one. There is no "guaranteed" job, for sure. It really depends on you.
4. As for skills, basic survival skills? LOL Basta hindi ka mapili sa trabaho at committed ka sa end goal mo (which is to gain PR). Be resourceful, be ready to adapt and walang complaints dapat. Make the full commitment, yun lang siguro. Ipagpaliban mo muna yung shopping at saka lakwatsa (unless marami kang pera).