Ordering E1/T1-via-MPLS To My Colocated Server?

I need to colocate a server, and then order two E1 links to it (to be more precise, it's one link and one backup). Both the colocation DC and the link's destination will be in NY metro area. The link will be delivered via MPLS.

Please, could you help me to clarify the following points:

1) How much, very roughly, should an MPLS E1(+backup) cost in NY metro?

2) I understand that usually there are several quality of service classes in MPLS (e.g., realtime, guaranteed, best efforts, etc). Do I understand it right, that I can have, say, 20% realtime, and 80% best efforts, and then 400kbps would be reserved for the lowest latency traffic on E1 line?

3) What kind of quality guarantees (e.g., max/avg latency) are usually given for T1/E1 MPLS lines?

4) How expensive is "realtime" quality class compared to "guaranteed"?

And last, but not least
5) how is this E1-via-MPLS link delivered to my server? (I think, this is something called "demarcation" or "demarking" or whatever it is called). Does it terminate somewhere in the DC building? And how does it go from there? Do I get a copper ethernet plug in the end?

6) Do I need to pay an enormous cross-connect fee to the DC (in addition to the E1 fees to the line provider), or are these things normally much cheaper than intra-DC cross-connects?