So for the first question I just used the Formula tool using TrimLeft to remove the leading zeroes in the Field1 column and display them in a new column.
For the second question I again used Formula to remove the leading zeroes before using TexttoColumns to remove the colon and the select tool to choose the appropriate column and rename them to match the given output.
For the third question it was just using TrimRight to remove the ID from the end of some of the entries in the ID column and display this in a new column.
Finally it was just an If statement to add SC if there was only 6 characters and to limit the others to 8 characters