給料：きゅうりょう： $$$: the usual word for salary
給与 :きゅうよ： salary. You can use either 給与 or 給料 for salaried jobs or hourly wage jobs.
But 給料 is a bit more useful. For instance, 'payday' is 給料日、 not 給与日.
収入：しゅうにゅう： all income (job as well as 401k, stocks, allowance, etc.)