Which haynes manual should I get?
 

I have a 2002 Volvo v70 XC with turbo and awd.
I have been looking for a manual to help me repair things such as the head gasket. But I'm not sure which one to get.
The first one is for V70XC's from 1996 to 1999. (https://haynes.com/en-us/volvo/v70-xc/1996-1999)
The second one is for V70's from 1998 to 2007. It does not seem to include turbo like the other one. (https://haynes.com/en-us/volvo/v70/1998-2007)

Which one should I get? Are the XC versions basically the same as the non-XC ones? Are there any other manuals you reccomend?

Find the factory service manual online. It's called VIDA. Originally came on a dvd and was installed on your cpu. Someone stole it and hacked it to work without a subscription and it easily found free online. 2014 was the last year Volvo published their service manual that way - that covers cars through 2015.

On Swedespeed in the OBD section you will find comments from those that might sell it loaded on a flash drive or have links to a free download.

Doing a cylinder head job. Is there actually coolant in the oil? Meaning the oil looks like a brown milkshake? Or do you just have a tiny amount of brown goo on the top of the dipstick and maybe under the oil cap? If coolant has been leaking into the oil - coolant is heavier than oil and sinks to the bottom where it is picked up first and used as lubricant - water/antifreeze does not lubricate and can quickly damage your engine bearings.

Volvo's rarely leak coolant into the oil - the oil drain passages are just too far away from the cooling system. If you overheat you will warp the head and damage the head gasket, allowing combustion gasses to be forced into the cooling system, and if bad enough forcing coolant into the cylinders. There are some Volvo engines that crack cylinder walls - but that is usually just the R engines.

You will need a couple of special tools to time the cams when putting the engine back together, and you will need to have the head straightened, not just resurfaced. When a head warps, it warps on the bottom and the top - meaning the cam bearings are not longer aligned - straightening the head fixes that.

I have not drained the oil yet, but on the dipstick, it looks like chocolate milk, but with no bubbles or froth. Also, how would I tell if the engine bearings are bad?

which bearings - the cam bearings or the main / rod bearings? At any rate, start by draining the oil through some filter paper to see if you have any debris like metal filings. Do you have any knocking noises? When you start disassembling the head you will be able to inspect the cam journals and bearings for any signs of wear, scoring etc. To check the bottom end, you'd need to drop the oil pan (look for more debris) and remove one or more of the bearing caps.

The engine sounded fine. And for bearing, I am talking about the ones that would get worn because of the coolant in the oil.

I ended up getting the second manual (https://haynes.com/en-us/volvo/v70/1998-2007) as it includes the B5244T3 engine. Also, I got VIDA, but the Haynes manual was more useful to me.