Not really, but I am new to the game and wanted some questions to be answered

Some background info before I get started.
I've spent the last 6 years with mostly MMORPG games; I've played well over 50+ mmorpg's such as WoW, Rift, Allods, RS, Forsaken World, Requiem the list goes on. I tell you this because... well, not sure to be honest, but I figured it would make this game easier, though it seems quite unique. Onwards to the questions!
1. I understand that you pick multiple classes in this game which allows you to create a unique play style and skill set for your character. I've always fancied Healers and characters that vomit DPS on people. As I look through the class specific sections, I'd love to have some recommendations for this particular play style as well as others that are simply fun to play, but don't relate to healing and massive dps. ( FYI,I love pvp)
2. As with many f2p mmo's there is a cash shop. Will I toss my wallet at this company to have outstanding gear? Or can I obtain it by simply playing the game?
3. What is the community like? I admit I am a bit biased when it comes to games as the vocal minority tends to stick out which gives other people the impression a game is filled with mostly pesky children. Though clearly this isn't the case for a lot of communities.
4. Is the content evenly spread out in ROM? Will I rush to the level caps to enjoy content? Or will I receive a steady stream of awesomeness through-out the game?
5. Grinding... the evil word that instils fear into the hearts of gamers. Will I level up through mobs? Or by questing and doing dungeons?
These are the most important to me, so I would greatly appreciate assistance! I look forward to seeing some of you in-game