Smoking & starting problem

Hey all, I have a 93 S10 Blazer 4wd 4dr. I know its fuel injected but when i start it i have to pump it. I think its the fuel pump. Also it blows out blue smoke from the exhaust and also behind the engine. I think there might just be a leak somewhere from the headers but not sure.
Any suggestions please let me know thanx.

The smoke is more than likely valve guides. S-10s and Blazers are known for these problems. I assume the truck has over 100,000 miles? If so, worn valves are a given. I don't know about the other problems.

How is the gas milage...and is it a Wseries?
Is the 8th digit in the VIN a W?

The gas mileage is ok it takes alot of gas. Yea its an w series and a 8th digit. Also i noticed when i put the heat on and it says vents it doesnt come out from there. If i put it on floor, defrosters, and vents it doesnt matter it just come out in the spots except the vents. Do you kno anything about that?

does it idle rough, rich?