You need to update your profile so we know what bike it is you own.(please report back)
These bikes have a tip over switch that cuts the motor when you lay them down but the should reset when the bike is upright again and you cycle the ignition on and off.
You should Google your bike and find that switch to ensure it is still in position.
Often during a crash like yours the wires to the clutch switch get disconnected or moved, do you get a CHECK warning up on the dash when the dash is working ?(please report back)
After a fall oil from the motor can fill the air filter box, that is sucked into the air intakes making the bike hard to start and smoky.
The battery cables on bikes often work loose over time you should ensure yours are clean and tight as that could be the reason for ignition not always working.
Depending on the bike you have and what is displayed on your dash we maybe able to point to other things to help you out.
Some of the 19 rides in my shed
2014 V2, Snoopy
2009 Wee, Pumbaa the pig
WR450F, The Blue Postie Bike
YZ250N smoker with rego, Stinky.
Yamaha MT09 (FZ09), The Scud missile.
Club Lead not Club Med.
He with the most toys wins.
Out of my depth in a puddle.
Live life on the edge you will see more that way.
Ridding a motorcycle keeps things in balance.
At the end of each trail and at the end of each day history is made.