Have i brought a lemon

[Potta_91]

Hi all im new to this forum. i brought a dturbo yesterday this is my third one now after the first one being torched n second one needing to much for the test. When viewing it yesterday first turn of the key kicked up straight away with only a tiny bit of smoke. I was happy with it till this morning when coming to start it would not start for a while and when it finally started there was a big puff of white smoke and was lumpy, although it did sort its self out after a few seconds and a rev. The glowplugs look fairly new. Anyone got any advice for me?

Also iv noticed a whinning noise coming from the drivers side under the bonnet, its weird because when I but the clutch down it disappears doesn't seem like the clutch bearing s though. Sounds like a belt or something I'm not to sure.
Thanks in advance mark