Random Stuff While Car Is Apart

[Alpine TSi]

So I have a few questions about various parts of my car while I have it all disassembled.

1. Where can I get 6 new bolts for my flywheel? They all just about turned into circles with trying to get them out. Someone who worked on it before thought 110 ft-lbs wasn't enough...

2. When putting them back on, would it be bad to put some anti-seize on them? Will it throw off torque readings? Etc...

3. Do I really need that intake manifold stay? It was a PITA to get off and I could imagine much worse to get back in.

4. What would it take to get rid of the AC pump and related pieces? The belt has already been removed from what I can see.

5. Where the hell can I get a 13mm hex head socket to take off the head bolts? None of the parts stores up and down Robert street have it.

6. Will a stock headgasket hold 25 psi? I will be using ARP head studs if it matters.

7. Last and not least... It is normal to look at a handful of bolts and scratch your head saying, "Now where the hell did those come from"?

Thanks in advance...

Yes I know I am a n00b....