Rangemaster 110 Help!?

My display clock has just gone out, which rendered the oven unusable. The ignitions weren't working either. I changed the fuse in the plug and the whole thing went bang! I am scared to do anything with it now. Any ideas before calling someone. Although it is such an old cooker, it seems hardly worth getting it repaired unless someone thinks it could be something easily fixable?
Please help. Thanks.