Colleges in Delhi

No, Google and Mircosoft don't come on campus, but you will get opportunities to get enrolled in them. 3 students from the 2016 batch got placed in Mircosoft with a package of INR 43 Lacs/annum and many students did internships from Google, Mircosoft, ISRO, etc.

You can go for IPU where the college fee is also nominal. You can go for best colleges of IPU like MAIT, BVP which costs INR 1 Lacs/annum, there are some govt colleges in IPU also like GB Pant where the fee is around INR 40,000/annum and they are even good too.

The eligibility criteria of BCA of Mahatma Gandhi University, Delhi is 10+2 in any stream or equivalent.

Yes, you can apply. the eligibility criteria of B.Com(Hons.) of Hindu College (Delhi University) is given below.
Eligibility criteria :
1. An aggregate of 60% or more in English/Hindi and combination of three best among the following subjects: Mathematics, Accountancy, Economics and Business Studies/ Commerce.
2. Additional eligibility criteria : 50% or more marks in Mathematics/Business Mathematics.

JNU does not offer B.Ed. You can do it from other universities such as DU, Jamia, IP, CCS etc. You need to pass an entrance test to get admission in this course.