Airguns do not put any appreciable amount of lead into the air. It would probably be wrong to say that there is NO lead in the air after an airgun is shot, but it is safe and accurate to say that there is not enough to cause any problems--even after extended and repeated exposure.
Depending on the kind of pellet trap you use, you may need to deal with a small amount of lead splatter generated AT the target. It's not going to get into the air, but if you use a metal type trap then you should probably place it on some newspapers for easy cleanup.
After shooting, wash your hands carefully with soap and cold water to eliminate any traces of lead on your fingers and you should never have any problems.
There are airgunners who shoot thousands of rounds a month and have their lead levels tested regularly without showing any elevation in the levels at all.
The RWS 34 is a solid gun. It should last a long time.
Some tips.
For extended spring life, choose pellets in the 7.5 to 9.5 grain range that fit the bore snugly when loading.
When shooting, remember that the a spring piston gun recoils BEFORE the pellet even starts moving. It's important to hold the gun consistently. Cradle (don't grasp) the stock with the palm of the weak hand. I use a screw or other landmark on the forearm to get my hand in the same place for each shot. The strong hand should grip the stock lightly--just enough to stabilize the gun. The gun should be against your shoulder firmly but you don't need to push it back against your shoulder with either hand. Don't push your cheek down on the stock, just let it rest lightly against the cheekrest.
Don't overclean your airgun. Airguns don't foul like firearms. Also, the bores are more delicate and the steel of an airgun barrel can be softer than a firearm barrel. The bore will rarely need cleaning unless you put a TON of lead downrange.
NEVER use any firearm solvents or lubricants on your airgun. Spring piston airguns have unusual lubrication requirements and contain seals which may be damaged by firearm solvents.
Don't overlubricate your airgun. The cocking linkage needs grease, and the barrel latch needs some good lube. The rest of the gun shouldn't need much. You're more likely to damage the inner workings by lubricating too much than too little.
For more information, visit the airgun forum at
www.straightshooters.com