If any variables have multiple modes the quickest way to find these is running bar charts over those. Result will appear in the SPSS output viewer. There are a number of different ways of calculating the median in SPSS.
This will bring up the Frequencies dialog box.
For example we use an independent samples t-test for 2 independent means and one-way ANOVA for 3 independent means. Remember that you wont always get a. This will bring up the Frequencies dialog box. There are a number of different ways of calculating the median in SPSS.