As per RAW (Rules As Written), you cannot move AND attack when using the ready action, as the PH, p.193, says the following:
Then, you choose the action you will take in response to that trigger, or you choose to move up to your speed in response to it.
The reason for this is that, since you are using your reaction to, well, "react" to the trigger, you can move again using your reaction, not your movement. So, technically, you could move your full speed during your turn, and then move your full speed again as a reaction.
Mind you, there might be some clause hidden somewhere in the PH, on Sage Advice, or at some other place that describes this more detailed and potentially says something different - if so, I'm not aware of it and would be happy about any hint about it.
Anyways, while you - as per RAW - can't take both an action and move as part of a readied reaction, your DM (or you, if that's you) could always houserule in this regard, such as saying that:
[potential house rule] When you take the ready action, you can move half your speed (or your remaining speed, whichever is lower!), and take a regular action. Alternatively, you can move up to your full speed (regardless of how far you moved during your regular turn), but you cannot take an action.
If you do use this (or a similiar) house rule, you should notify your players that you might change it later, depending on how powerful it turns out to be.
Also note that, since one takes his reaction for this, other things that one can usually do using one's reaction become unavailable until after one's next turn. Examples include making an opportunity attack or casting the shield spell.