It depends on the card and the circumstances, but in many cases yes. Planeswalkers are always very good.
I presume that you mean set blocks? Zendikar Block has 6 Planeswalkers Lorwyn Block has 5 Planeswalkers Alara Block has 5 Planeswalkers M10 has 5 Planeswalkers (these are reprints of the Lorwyn Planeswalkers) The best planeswalkers are found in Zendikar Block: Gideon Jura, Jace 2.0, Nissa Revane and Sarkhan the Mad
No.
there is no limit
No, permanents are cards on the battlefield, ie Enchantments, Artifacts, Creatures and Planeswalkers that have resolved to the field, as well as Token creatures, and Lands.
you can equip it with up to five equip cards unless you have other spell or trap cards on the field then you could only equip it with as many free spaces there are There is no limit to how many cards can be equipped to a monster unless it says so on the card. The only limit is how many you can have on the field at one time, so the de facto limit is 10 (5 on your side of the field and 5 on your opponent's side of the field).
Rise of the eldrazi
American players are called 'imports.' Each team is allowed to field 12 players. There is no limit as to how many of the 12 can be imports.
Magic The Gathering - Duels of the Planeswalkers 2014 - 2013 VG was released on: USA: 26 June 2013
There is no set number. Some track meets have a limit to the number of entries but I have never heard of any team having a set number of people. the only reason a college team may have a limit is if a coach sets one.
sky is the limit, we have to think beyond limit
no