Yes, based on current guidelines you should qualify. Persons whose only income is a Social Welfare payments qualify even if their actual income exceeds the financial guidelines.
You can download an application form and get more information here:
As there is additional income (wages and JB) you will have to satisfy the income guidelines to qualify - follow the link above to see the 2009 income guidelines. If you don't qualify for a medical card, you might qualify for a GP visit card.