yep , a sequencer is all you need , the rest depends on creativity.
As for freaky low fi drumsounds, buy a cheap microphone and start hitting everything in your house, record it!! when you are finished with the house, go inside your car, work, the forest, the city, sportcenter!!! drop things , hit things, move things and record!!! put these sounds in you soft sequencer and you should be able (ton) to produce some far out beats with that!!