Here's a simple video about how I made a Tim and Bob sounding beat. The quality of the sound isn't that great because I still have to get some good recording software. The actual beat is played at the beginning and end of the video.
This video is ment to give an impression about how you could start to make a beat with this kind of feeling and sound. All is done with free samples and soundfonts. I do not claim to be at the level of Tim and Bob.
I couldnt record the bass sound on the video.