UPCAT

Yes, your chances is possible. And, you have to wait for counselling.

No, there is no such criteria by which you can get admission in SPA by UPSEE. You have to clear JEE paper 2 for this.

With your rank, I can predict that you will get a mediocre level private college.

You have to fill your category at the time of counselling, then as per cutoff chances per category varies.

Yes, there is a chance to get admission with this rank.

I am going to put some facts here.
UPSEE 2016 432 marks-Rank around 3800 in General Category
UPSEE 2015 432 marks-Rank around 1600 in General Category
UPSEE 2014 432 marks-Rank around 2300 in General Category
For getting a government College, your rank should be under 6000, if you belong to general category.

Yes, there is a chance to get admission in Private Colleges.

You can try for IERT-Allahabad. It is the only college, where you can have a chance.

With a rank of 3621, you can get BIT or IERT-Allahabad.

Yes, there is a chance with this rank to get a seat in CSJMU.