IELTS

No, you cannot get admission. You should reappear for the IELTS test.

For visa, your marks are not considered. Your motive of visit and aim plays the important role.

IELTS or English language proficiency test is required in the UK. You must write to the universities if you are planning not to take any test. It is very rare that they accept candidates without an IELTS score. Visa rejection chances are also going to be high.

Yes, you can. Apply online or get assistance from a study abroad consultant.

TOEFL (Test of English as a Foreign Language) and IELTS (International English Language Testing System) are two of the most widely-accepted tests to certify your English proficiency.
TOEFL follow mostly North American English accents and IELTS follow a range of international English accents. The length of TOEFL is 4 hours and that of TOEFL is 2 hrs and 45 minutes.
Fees:
IELTS : In India, the fee is Rs.11300
TOEFL : more than 200$ and not more than 400$
If you don't want to spend a lot of money and if you are not a native speaker then go for IELTS It is less complicated.
Best of luck!

Hello Arun,
You have a decent profile and you are eligible to apply for most of the universities in Canada, NZ and Australia. Your work experience will be an advantage, but your B.Tech aggregate is pretty less.
I would suggest you to take GMAT and score well. A good GMAT score can definitely hinder your B.Tech Percentage. Your IELTS score is fine, unless the sectional scores are above 6.
All the best.

Hello Vaishnavi,
GMAT is required to get an admit from top B-Schools in Australia. However, some Universities in Australia do accept without GMAT score. But, the VISA officer might ask to produce GMAT score.
All the best.