Hey Xalet, maybe I can shed a little bit of light on your situation, but I am afraid I only know a great deal over the first question.
For your number one, how will Xalet summon a familiar? It states in the wiki that the familiars are tricky, powerful and deceitful creatures, and thus summoning them is very difficult. There are few wizards that attempt this on a regular basis, and if your character has no magical skills in the field of summoning I do not believe he should even attempt such a dangerous thing. Now, if your character is having someone ELSE with a high lvl of summoning do it for him then I see no problem with it. Now, onto your question. Does interacting with a summoned creature give you Familiar points? In my opinion no, and that is due to 2 things. 1) the creature did NOT become your familiar, and 2) your character did not actually interact with a FAMILIAR but with a summoned being. Now someone else may feel differently, but it was my understanding that for any player to gain familiar points they must first OBTAIN a familiar. That is my take on the subject, but of course a founder's opinion trumps mine lol
As for number 2, I am lead to believe that one could possibly use the 2 unfinished familiars, however I am not sure how accurately one could RP them with out a working wiki on them. There is no rule that I can find that prohibits their use, but I am not sure if it is advisable or not.
Hope this helps
Mirage