There is a set symbol in the middle-right of each Magic card that can show you the rarity of the card. Black means common, silver for uncommon, gold for rare, and red for mythic rare. This, however, only applies to cards that aren't old. Many old cards don't color-code the rarities, and some particularly old sets don't even have set symbols printed on the cards. For these, you can use Wizards of the Coast's Gatherer site to find out the rarity of that card.
Organisation of anything is always a matter of personal preference, although if you are a hardcore collector you will inevitably end up with thousands of them and some system or structure is probably advisable, lest you risk not knowing what cards you actually have or be rendered unable to find ones you think you should have.
You can organise by colour, type, set and name or a variation of those so that you know roughly where to look for that extra Duress or Eternal Witness for your new deck.
Out of preference, when I reached a sizeable collection I spent a weekend ordering them by colour, type and name; I crafted a spreadsheet so I could filter electronically without having to even touch the cards themselves, test out the deck and finally, if I liked it; extract the cards from the collection.
THE same way you shuffle any deck of cards. try to spread out your lands so they dont stay all jumbled up
shuffle like a normal deck of cards, but dont bridge them.
A giant deck is a deck consisting of the creature type giant.
You can do a search at allmagiccards.com and essentialmagic.com
you can have any number above 60 cards in a deck you just have to be able to shuffle it with out assistance
60-75 cards,
You just need a good deck with flying and cards that give you life
The best place to make a deck online would be cockatrice.de because after you make a deck you can test for free.
I presume that you mean tournament packs. If so they are random.
Email me at ocwilles@gmail.com if you can help me!
Use the Store and Event Locator from Wizards.
If you are referring to a pre-constructed deck, you can buy one at any store that sells magic cards, or anywhere online that also sells magic cards. If you are referring to a deck archetype, you will need to search online for a decklist of cards that you require.
The Wikipedia claims that the Black Lotus is the most valuable card ever.
Could the asker please direct us to a decklist for the deck itself? We can't help until that happens.