How many season I can play in manager mode

Make sure you include training days on your roster. Chemistry comes from the players getting used to each other, so the more exposure they have to each other, the more chemistry will develop.

Player happiness also affects chemistry. If you hire an EPL player to play on an MLS team, chances are he won't be happy because he won't be playing in a league that his skills demand. Paying the salary they deserve also helps their happiness. Benched players are also unhappy so consider loaning them out -- especially if they are young, inexperienced players.

Essentially, look for ways to raise morale and get the players to know each other.

Also, putting your players in their desired position helps with "formation chemistry". Keep your right backs at right back, your strikers at striker and they'll be happier players. This might only apply to the Ultimate Team pack though, which I don't think is available on PC.

Can you spectate on a Quake 3 match using ioquake3?

I'm afraid you can't, but I can't say for sure. ioQuake3 eventually found one baseq3 server (at 163.36.202.155:27960) but failed to connect to it (it got stuck at Awaiting Challenge). I'm afraid they may be network incompatible by default, then.

What is the best way for adding anaglyph support to Quake3?

ioQuake3 claims it natively supports anaglyph rendering. You can enable it by using the r_anaglyphMode 1 cvar.