As I am not very good on my feet.Can you take a bus tour to all the tourists spots in Berlin.
"all": certainly not
There are of course bus tours. Many.
Famous are also the bus lines 100 and 200 as they connect may sights of Berlin and you just need a local public transport ticket to use them. A day ticket is EUR 5,80. As Berlin is a widespread place, this makes even sense if you are good on foot.
by Panorama S-Bahn
There are several of the tourist 'hop on hop off busses' we did one and frankly it was pretty bad, the comentary was awful and you did not get a very good view of most of the sights. However if you are keen on getting off at each stop, checking out the sights and then waiting for the next bus it may be for you.