S.P.
Kids get most of their nutrients from breast milk or formula until around age one, so the more the better. Other than that, trying to get a rounded diet is good but it doesn't matter much what you feed them. They are ready for table food when you can see that they are chewing what you spoon feed them and can pick up small pieces on their own.
I make all my food but this is about what my son ate and 8 months:
6-8 oz oatmeal with an ounce or two of fruit in it
3-4 oz fruit
3-4 oz vegetables or squash
cheerios and raisins
3-4 oz yams
3-4 oz fruit
pieces of what we were eating...meats and such
grahm crackers