Dear Sir,
Firstly, even if your income after deduction is less than slab rate, you are required to pay itr. So, I recommend you to immediately file ITR for last two years. We can help you in filing ITR. Please reach out to us at , if you need any help.
Now coming to your questions.
1. If new property which your purchasing is a residential house property, then you don't need to pay any taxes. You have to either buy the new property before return filing date or deposit the sale proceeds of old house in cgds scheme before return filing date and then purchase new property within 2 years from the date of sale.
2. Yes, you can do so, keep your name in first holder.
3.No, he will not be able to take any IT rebate.
4. Yes, you are liable to pay taxes on interest. We need to know the interest amount on which taxes has not been paid.
Please feel free to call/revert in case of any doubts
Thanks and Regards
Abhishek Dugar
CA CS B.Com