Here is a couple of easy to play ranged heroes
Ranged heroes:
Drow ranger
Really easy to play - she's an easy pick for a damage dealer and has the pub stomper fame. Mostly a right-click hero but gets some utility from items and the silence.
Skills: when you get to level 5, have a 3/1/1, then max Frost Arrows, then the aura, finally max the silence.
Items: Usual items to get are Shadow Blade (escape mechanism, initiation, chase) and mostly more damage - crit and/or agility items work very well. Some people also get her lifesteal. For boots, she needs threads switched to agility.
How to play her: in the beginning don't forget to harass the enemy. Don't forget to harass them with Frost Arrow - you can easily get a kill early on if they can't run away because you keep slowing them. Later on, put enemies in situations when they can't run away - get between them and their escape route, set FA to auto-cast and just right-click. You can easily win mid-game this way. Obviously Shadow Blade helps a lot when doing this, so you can position yourself.
How not to play her: or in other words, how to play against a Drow. Simple. Attack her. She does damage but by simply killing her, she stops doing damage. Drow's game is to put you in situations where you have to choose to go after her or go somewhere else (in group fights, she'll probably your team would probably be sandwiched between her and her team) - just go after her. It's that simple, really.
Silencer
I really like him, because he's both really annoying (for the other team) in the beginning and can stay up through the game. He can also be played as a support or a damage dealer, possibly falling comfortably in about the semi-carry role.
Skill progression: First max by level 5 do a 3/2 in Curse of the Silent/Last Word or alternatively 3/1/1 and focus on LW afterwards. I tend to prefer LW over Glaves of Wisdom as it's better in the beginning. In some situations you might not want to max the curse but for a beginner, I believe what I described above would work just fine.
Equipment: Intelligence is an easy pick but also damage and utility. In the beginning, go for two Null Talismans and a Power Treads switched to Intelligence (or you could go with Strength first to get some more health then switch to Int later on). I really like building an Orchid with Silencer, since 1. it's thematic 2. it's fucking awesome - gives damage, attack speed, intelligence and some added utility. A Scythe is a reasonable alternative but it's also more expansive. The Orchid is built of cheap parts and gives you bonuses as you're building it, too, so most of the time, it's better to go for that. Another really good item would be Rod of Atos - it gives you HP and a slow. Other items beyond that include Eul's Sceptre of Divinity, Force Staff and Mekansm. For the rich, there are Assault Cuirass, Shiva's Guard and Aghanim's Sceptre.
How to play him: In the beginning keep spamming the curse. Well, once you hit level 3, that is - the first level of the curse is not that good for the mana cost. Anyway, try to get the two players (if you're in a lane against two) at once but don't take too long - try to always have it on cooldown, that's how you maximise the effectiveness. It's also worth buying a couple of clarity potions in the beginning, so you can keep harassing them. The Silencer is really good at stopping/slowing enemies in the beginning so it's worth being in a lane against the enemy carry. Other than that, slap the Last Word spell whenever appropriate. Just play for a bit and you'll get a feel for it. Also, try to be there when your team kills. Urge your team to ream and kill people, too. That intelligence steal does add up and it's really bad for the enemies, too[footnote]been on the receiving end of that - it can get to the point when you can't cast stuff because you don't have mana[/footnote].
