Lets see here, as I said, if you open up the NT, not just the gospels, and not just one part of the gospels, you will come up with a long list. Off the top of my head...
1. Give to the poor.
2. Love your neighbour as yourself.
3. When an enemy strikes you, turn the other cheek.
4. Help those who are beaten up by robbers.
5. If your eyes cause you to sin, gouge them out. Its better to enter heaven blind than to have your whole body thrown into the fire.
5 is enough, and I don't think I even mentioned anything of what Paul of Tarsus expects of believers.
I would never presume to tell a Christian or any other religious adherent how to practice their particular faith. If you believe that to be a Christian you must do more than what Jesus instructed in the Good Samaritan story , then you are certainly free to interpret Jesus' teachings anyway you deem appropriate.
However, it just seems to me that you are making things harder than they need to be. These, of course, are just my thoughts and you are free to dismiss or ignore them altogether, obviously.
Jesus was very specific in the story. He said there are only two things you need to do to get into heaven, love God and love your neighbor. That's it.
It seems every Tom, Dick and Harry that came after Jesus thought they were smarter than Christ and tried to re-write what Jesus seemed to make very clear. And yes, to hell with Paul of Tarsis. I don't know about you, but I don't worship Paul. And personally, I couldn't care less what he has to say about anything. He can take his thoughts on women's role in the home and in the Church, as well as his thoughts on the wickedness of homosexuality and any other ideas he penned to the seventh church of whereever and shove up his holier-than-thou rear end.
As to your list of "requirements" for Christianity, more power to you. If you find it necessary to make a list of qualities or duties that are necessary to be a Christian, I certainly will not stop you . . . but here are some more of my thoughts on the matter:
It seems to me that numbers 1 through 4 on your list are basically all the same. If you treat people the way you'd want to be treated, then you will find yourself naturally compelled to respect 1 through 4 on that list.
1. You call it giving to the poor. I just say if you are capable of helping out those who are less fortunate than you, then do so. If you are not, then you have no obligation. Again, it just seems to me that you are making this more difficult than need be. Just be honest with yourself, you know whether or not you are capable of helping those who have less than you. And helping the less fortunate doesn't mean you must give money or material items. If you have the spare time, then help out however you can. It's easy.
2. If you find number 2 to be impossible, then you might want to seek out a new religion, 'cause by my interpretation this creed is pretty much the one, central focus of being Christian: treating others with compassion and in a way you yourself would want to be treated. Everything else is just a bunch of noise and is ultimately meaningless, save this. But hey, that's just me.
3. How hard is it to forgive people? Besides, I daresay, if you are following number 2 above, then you will most likely find yourself with fewer enemies.
4. Yes, you should help those beaten by robbers, if you can. If you can't because you're raising four kids and working three jobs and taking night classes at the local university or trade school, then I daresay you are off the hook. Be honest with yourself. If you can honestly give more to those who are less fortunate or who need assistance, like someone who was just robbed and beaten, then do so. However, I don't think Jesus was asking anyone to put on a cape and fight crime on his behalf. Just do what you can.
5. Jesus was a smart guy. He often said things people don't understand. I really doubt he meant for anyone to literally gouge out their eyes for any reason. He was probably just making some sort of joke that went over everyone's head at the time. I don't know. However, though I don't see how it might be possible, if your eyes are really making it impossible for you to treat others fairly and with compassion as Jesus instructed, then perhaps you can get away with just a good, snug blindfold.
Honestly, as an irreverent agnostic jerk I find myself in unfamiliar territory by trying to speak out on Jesus' behalf. This is not my gig. However, I do respect and admire Christ's teachings. And though I may be missing something, it seems to me that Jesus was a pretty simple guy. He simply instructed us to love people. If you want to martyr yourself trying to do more than that, I certainly cannot stop you, but I think you are letting a popularized, Americanized interpretation of "Christianity" press its fatted weight unduly upon you. Popularized Christianity places more value in phony ceremony than it does in true thoughts and deeds, at least it seems to me.