You are missing valve adjusting plate, they come in different thickness and you adjust your valves with those by replacing disc with similar that has different thickness.
All part shops should sell them, also there are full series of those available which one could consider buying so adjusting valves would be easier.
You should have some papers from car that has VIN code of car, grab that and go to Volvo dealer and they might be able to get keys done by that.
If that fails, then you could torture 3 years old to reveal location of keys, however I don't recommend that as mothers can be scary beings in certain situations and it is not time you loose some body parts, also there are some nannying social workers lurking around corner.
So metal coat hanger is better solution, bend and twist it and put it into door from between door glass and door, then start fishing, your aim is to get lock knob up by moving links inside a door. If that fails, get strong screw driver and bend window frame a bit, then use thick steel wire to pull locking knob up. If that fails you may as well get a hammer and whack screwdriver into lock and twist few times so door becomes unlocked, do same to ignition and nobody won't bother to steal it, but of course you could get lock set from scrapper and including ignition lock.
Dear car thief, don't read what is written above

Volvo 360GL -88 -under restoration-
Volvo 343DL vario -81 -running-

Volvo 240 Diesel -83 -undecided-
Citroen ZX Dturbo -97 -daily-

