The only one I'd recommend is the Launch Creader 6 but, It still is only a generic fault code reader and it won't do anything other than engine systems. There is no guarantee that it will work with certain vehicles.

Have a look on ebay for a cheap one.

I have Torque downloaded onto my [Android] phone. The pro version is 3 quid and you'll need a blutooth OBD adaptor (mine was £17). It can read and clear ETCs and you can also use it to observe live data and so much more. Have a look on the Play Store. I've used it to read and clear codes on several cars. Very useful for the money.