decantedblooddrinker

Can anyone help me I wonder? I have just bought a WRX 1995 M Reg from a Private seller. I purchased it yesterday. Today I have been driving it and suddenly the Speedo has stopped working, the Mileage gauge has also stopped (against the law i think), and the 'Check Engine' Light has come on. Also, my Boost gauge is now falshing at 0.45, when it was flashing at 1.0. Does anyone know if this may be a fuse? Or if it is going to be expensive? Thankyou Roland