You can only ready one action
You certainly can't ready a standard and a move action. The rules are very specific that you ready an action.
Free actions are free!
What about adding a free action? Well:
You can perform one or more free actions while taking another action normally.
You can't literally ready both, but it seems like there's nothing preventing you from taking a free action along with your later action. Free actions accompany another of your actions; they don't seem to necessarily have to occur on your turn.
Keep in mind that if you couldn't use a free action along with your readied action, you wouldn't be able to draw ammunition or prepare spell components. Generally the rules seem to assume that if you're performing one action, a free action can come along for, well, free.
If you can take a free action, you can take a swift action:
You can take a swift action anytime you would normally be allowed to take a free action.
Finally, the rules explicitly state that a five-foot step ("not an action") is ok:
You can take a 5-foot step as part of your readied action, but only if you don't otherwise move any distance during the round.
What the rules also say
A DM can explicitly limit your free actions, if they feel it to be reasonable. So personally, I'd allow you to drop a weapon and then move, but I might not allow you to case a quickened spell along with a readied action for spellcasting.