Reclining means leaning on one's left side while eating. A left-handed person, too, must recline on his left. Nevertheless, if a left-handed person mistakenly reclined on his right side, he has fulfilled his duty, since he had conformed to the opinion of Rashi. Preferably, one must recline upon pillows, for such is the way of royalty. One's table must already be set at daytime, so that the Seder can commence immediately at dark.
Most people do pour the wine for each other, at sedarim nowadays.
It is permitted to drink anything, including wine, between the first two cups. Nevertheless, one should refrain from drinking more wine between the first two cups. No blessing is recited for this hand washing. The vegetable used for karpas must be a green vegetable, since that is how the Gemara refers to karpas. Another reason that greens must be used is to fulfill the requirement to use a vegetable that increases one's appetite.