1. No, if you are the principal applicant then you must sit for IELTS. however, spouse doesn't need to sit for IELTS.
You must sit for General training IELTS not the Academic one
2.YES
1.CAN ANYONE SIT THE EXAM ON MY BEHALF AS I AM NOT CONFIDENT. PLEASE HELP ME.
2.IF I DONT SUCCED IN GETTING THE REQUIRED SCORE WILL I HAVE TO PAY THE TOTAL FEE AMOUNT TO RESIT AGAIN?