Ford Ranger blowing white smoke but not overheating?

I recently just bought this truck, a '94 Ford Ranger V6 3.0L, 5 Speed with 138,000 miles.
I took it to a relative's house a little over a month ago and my check oil light was on so I just went for a normal service (didn't have a service sticker on when I bought it). I had them check it for oil leaks and they changed the oil plug and said that I had some leaking around the motor that wasn't that bad.

So I left it alone and just stuck with changing the plug. Around this time I started noticing that when I was driving around in the city where I have to start and stop a lot that it was blowing some white smoke while sitting and then when I would take off through first and second gear.

A month later my oil light came on that my oil was low again, so I changed it and went and replaced my valve seals also as they showed signs of needing replacing. As soon as I had it back together, I took it down the road and brought it back. When I got out and let it idle for a few minutes, it seemed to be blowing quite a bit of the thin white smoke.
The next day I found out that my water pump was leaking, so I started taking it back apart to replace it.

I'm concerned that the white smoke means I have a blown head gasket, but the truck NEVER heats up past the normal range on the temperature gauge. Does anyone have any thoughts on what it could be? Is it most likely the head gasket?

I've heard that white smoke baloney too many times. If you have a blown head gasket… A little blown head gasket. The water is getting into the combustion chamber. So, heres the rub. Its not white smoke, its steam! There's nothing wrong with a white colored exhaust coming out of any car, it means the engine is running good actually! Or a lighter colored exhaust. If you suspect its steam, a head gasket… Just let it idle there, after its warm… And throw a towel or something under the tailpipe and see how much water! Runs out of your exhaust. You can't do it if the engines been cold, all vehicles throw out a lil water then, that's just natural condensation from the air temp, so after its hot, or normal operating temp. Then look for water running out your exhaust!

I have a1999 ford ranger 2.5liter 5speed massive amount of white smoke coming out exhaust and still running hot after a blown head gasket what do I do I've done replace the radiator, thermostat, head gasket ran motor flush through changed oil and filter 2 times what do i do it has 211,656 on miles