car sitting idle for 9 months

You shouldn't have any major problems. Turning over a sleeping car is bad for it - don't use it at all, or take it out for a good long run.

Put your wheels on and check the tyre pressures. Check all your fluids, drive belts, hoses, wires etc. Recharge the battery (really you should have taken it out, stored it somewhere dry and trickle-charged once a month). The tank should be full before a long rest to reduce rusting - you should have only one tank unless someone added the supplementary tank (very unlikely).

Unless the oil was extremely old it should not have solidified in 9 months. Disconnect the lead from the condenser to the distributor, and then turn over the motor until the oil warning light goes out. This will pump oil back through the motor, plus allow the fuel pump to refill the system. Reconnect the lead, and hopefully it should start. Run until warm, then do a full service (oil, oil filter, air filter, spark plugs etc)

The brakes may be a bit stuck/rusty after 9 months - try them gently a few times before relying on them, and check them often for the next few weeks.

Keep a close eye on fluids etc for a few weeks as hoses etc may have deteriotated.

If you want to be good change the gearbox oil, differential oil, brake fluid and coolant - depends on how long it was since they were last done. Check your cambelt is not overdue.

Finally vacuum, wash, polish etc and enjoy