Spontaniously starting of hotpoint oven.

SOURCE: Hotpoint Gas oven doesn't light

Sounds like the oven ignitor is weak.  If everything else is working it must be a bad ignitor.  These are usually easy to replace and can expect to pay $70-$100 for the part.  Check to see if it glows when in bake mode first.  If it does then replace the ignitor.  You can look at the ignitor,  when not on, if it is white-ish then it needs replace or if it doesn't have a full glow, can compare to broil ignitor, then it needs replaced.  Let me know if you have further questions.

SOURCE: Hotpoint RGB745 Burner Problems- Unique, needs help

burner not working

SOURCE: Hotpoint Gas oven doesn't light

Is the gas valve easy to replace on a gas oven?

SOURCE: gas burner not igniting on Hotpoint RGB745, can smell gas

check to see if any of the port holes are clogged.. usually where the ignitor comes into the burner head

SOURCE: Gas Range has inconsistent gas flow

From what you've described and what I understand; the only part that requlates the gas flow "low or intermitten gas flow/pressure" is the "gas pressure regulator" located where the incoming gas flex-line connects directly.

The pressure regulator is about 3" x 3" metal square blockish' type device and can be replaced fairly easy. However, if and when replacing the pressure regulator, ensure you are using the proper gas - yellow teflyon tape of pipe dope paste to thread in the new part.

What is the model number of the range? (free standing - gas pilot only)

(The above suggestion is assuming you have the proper gas supply pressure to your home/range)