Public transport??? I wouldn't even know what that looks like even if it ran over me! I've seen a few buses around but would not have a clue about reliability or even where the bus stop is. Saying that, if you need to travel by bus, you could easily find out where to wait for the bus though I would be inclined to say that it is likely that they never run on time!

I live in JBR and I have no trouble catching a taxi in the morning - the most I've had to wait was 5 mins (I normally walk out and straight into a taxi!). Those areas are quite affluent so taxis seem to be quite abundant throughout the day. However, I would suggest that you choose an area based on your personal tastes rather than the availability of taxis.

It is actually better to get your own car as it gives you a lot more flexibility and mobility. Alternatively, if you are patient, the metro will open in September 2009. I forgot to add that you could also live in JLT (opposite side of Sheikh Zayed Road to Marina).