This will remove
all numbers at the beginning of a line of text
In the examples you gave you'll still have an empty space at the beginning of the title. Just add a space at the end of the above code and it will remove it.
To breakdown how it works:
The ^ character says to start at the beginning of the line.
The [0-9] says to look for a number
The + says to keep going until it hits something other than a number.