No. You can get back only the income tax. You cannot get back the FICA, social security and medicare.

Probably.  But you have to file a return.  Filling out the tax return will give you the answer.

You may be eligible for an "Earned Income Credit" as well.

We can't tell without more information.

You should get a full refund of income taxes if you are not a dependent.

Just the federal income tax, and maybe state depending on where you live. Not social security or medicare, and probably not local.

Yes for federal income tax withheld on the w-2.

Incoherent - Nonsensical.  Care to try again?