vibration in habitaculus

hello everyone. I bought 2 months a Chevrolet Corsa 1.6 year 2004 with 79,450 km. And notice that the address steering wheel vibrated a lot and now even more, the entire board vibrates . I started looking for the problem changing spark plugs since they were in poor condition, but the problem follows ... I get to the conclusion that it can be hard or dry motor supports since it tries to move the engine and it was impossible for me.
Can that be my problem and how to check if that is ???