UCEED

Hi,
Well, UCEED is conducted to shortlist candidates for the admissions. If one is unable to give the exam, then there is no chance of admission as the candidate's name will automatically be off the roll among the participants.

There are very fewer chances for you to get admission in IITs.

You can go with any of the laptop as designing courses have require a software which require RAM, so any laptop which has sufficient RAM, working on Windows 10 and good HDD space would be sufficient. Regarding the brands and more information you have to check it according to your price and then buy.

You need to not produce marks sheet, you can just mention that you are appearing for 12th exams this year. The options are already mentioned in the online forms you need not worry just fill the application form when it's out.

Kindly predict your college in this college predictor. JEE Main rank predictor is an online tool which predicts the candidates rank range and probable colleges based on the difficulty level of the examination, average marks scored in JEE Main and seats available in IITs, NITs, GFTIs, and other SFTIs. The rank predicted might not be accurate but it certainly does give an idea to the aspirant. Know your college admission chances based on your JEE Main Rank, Home State, Caste, Gender, etc. Here https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor

Hi,
No, you will get admission in IITs based on your score in JEE advance. You will get colleges under UCEED if you have appeared in the same. Best of luck.

7-8 lakh exclusively out of your own pocket.

Well, with this much score you have lots of choices to fill college.
Here is the link which you should follow for getting a prediction of the college according to your scored marks in NATA:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=6919840
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=6919840.