You need a real mechanic!
First of all they have a single timing belt that turns the two bottom, or exhaust camshafts. They are geared to the top (two) intake cams.
The engine has four cams, two over each head.
IT IS A NON-INTERFERENCE ENGINE!!!
That means if the camshaft belt breaks, the engine quits, stops running , but the valves cannot hit the pistons.
If the engine runs, but the power steering is not working, MAYBE it's just a broken or loose power steering belt.
Or the crankshaft pulley separated from the hub,
or it lost power steering because the automatic transmission fluid,used by Subaru in the svx, has sprung a leak, or is old and worn out.
If the engine does not run, then it is another story.
I would take it to a Subaru garage, or get a mechanic you trust to look at it.
We need more information. Tom