Should I label every row in a table of inputs?

Do you need a label on every row in a table of inputs? No.

1. Should all inputs have a label?
2. Does label go before or after input?

Should all inputs have a label?

Not all inputs need labels

An input with a type="submit" or type="button" does not need a label — the value attribute acts as the accessible label text instead. An input with type="hidden" is also fine without a label.

Does label go before or after input?

When using input elements of “type” checkbox and radio the label element should always be placed after the <input> element. Label elements should be associate with the following form elements: Input type = "text" Input type = "checkbox"