TANCET

Hi Sharath,
The cutoff varies every year according to the number of students applying for examination and number of seats available. It would be advisable that you get in touch with college authorities/official page directly for accurate cutoff.

A job at Infosys is good but everyone cannot secure a big good rank of 23 in TANCET, if you want to utilize your rank you can pursue Mba, also talk with your organisation if they'll sponsor you on a bond or can you 'Learn while you earn'.
You have a very good score so it's your choice between TSM and PSGIM. To be frank Placement in PSGIM is better than TSM, as you have international opportunities in PSGIM. Whereas TSM gives you placement into companies for the intermediate level of the organisation structure.

Yes, you can get admission in TSM through TANCET exam counseling or direct admission into TSM if you apply earlier.
CAT, MAT, XAT and CMAT scores are also accepted.

The cutoff for TANCET is not clearly given. You have chances of getting a seat at SKCET. If not, try appearing in college entrance exam and with that score you can get a seat.

Not Sure, but you can give it a try, as you have a chance through your BC Rank and also have other more options than PSG and TSM, and if you have made up your mind with MBA, first apply to TSM and PSGIM.