My logs:

10/15/2017 2:07:11 PM |  | Starting BOINC client version 7.8.2 for windows_intelx86
10/15/2017 2:07:11 PM |  | log flags: file_xfer, sched_ops, task
10/15/2017 2:07:11 PM |  | Libraries: libcurl/7.47.1 OpenSSL/1.0.2g zlib/1.2.8
10/15/2017 2:07:11 PM |  | Data directory: C:\Documents and Settings\All Users\Application Data\BOINC
10/15/2017 2:07:11 PM |  | Running under account Admin
10/15/2017 2:07:12 PM |  | No usable GPUs found
10/15/2017 2:07:13 PM |  | Processor: 2 AuthenticAMD AMD Turion(tm) 64 X2 Mobile Technology TL-50 [Family 15 Model 72 Stepping 2]
10/15/2017 2:07:13 PM |  | Processor features: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 htt pni cx16 syscall nx lm svm rdtscp 3dnowext 3dnow
10/15/2017 2:07:13 PM |  | OS: Microsoft Windows XP: Professional x86 Edition, Service Pack 3, (05.01.2600.00)
10/15/2017 2:07:13 PM |  | Memory: 893.97 MB physical, 1.69 GB virtual
10/15/2017 2:07:13 PM |  | Disk: 17.03 GB total, 4.95 GB free
10/15/2017 2:07:13 PM | Citizen Science Grid | URL http://csgrid.org/csg/; Computer ID 63551; resource share 100
10/15/2017 2:07:13 PM | Cosmology@Home | URL http://www.cosmologyathome.org/; Computer ID 328303; resource share 100
10/15/2017 2:07:13 PM | DrugDiscovery@Home | URL https://boinc.drugdiscoveryathome.com/; Computer ID 9798; resource share 100
10/15/2017 2:07:13 PM | LHC@home | URL https://lhcathome.cern.ch/lhcathome/; Computer ID 10502026; resource share 100
10/15/2017 2:07:13 PM | NFS@Home | URL http://escatter11.fullerton.edu/nfs/; Computer ID 5761751; resource share 100
10/15/2017 2:07:13 PM | NumberFields@home | URL http://numberfields.asu.edu/NumberFields/; Computer ID 46429; resource share 100
10/15/2017 2:07:13 PM | pogs | URL http://pogs.theskynet.org/pogs/; Computer ID 826435; resource share 100
10/15/2017 2:07:13 PM | Rosetta@home | URL http://boinc.bakerlab.org/rosetta/; Computer ID 3278128; resource share 100
10/15/2017 2:07:13 PM | SRBase | URL http://srbase.my-firewall.org/sr5/; Computer ID 65608; resource share 100
10/15/2017 2:07:13 PM | TN-Grid Platform | URL http://gene.disi.unitn.it/test/; Computer ID 17261; resource share 100
10/15/2017 2:07:13 PM | Universe@Home | URL https://universeathome.pl/universe/; Computer ID 230765; resource share 100
10/15/2017 2:07:13 PM | VGTU project@Home | URL https://boinc.vgtu.lt/vtuathome/; Computer ID 25967; resource share 100
10/15/2017 2:07:13 PM | yafu | URL http://yafu.myfirewall.org/yafu/; Computer ID 23704; resource share 100
10/15/2017 2:07:13 PM |  | General prefs: from https://grcpool.com/ (last modified ---)
10/15/2017 2:07:13 PM |  | Host location: none
10/15/2017 2:07:13 PM |  | General prefs: using your defaults
10/15/2017 2:07:13 PM |  | Reading preferences override file
10/15/2017 2:07:13 PM |  | Preferences:
10/15/2017 2:07:13 PM |  | max memory usage when active: 804.58 MB
10/15/2017 2:07:13 PM |  | max memory usage when idle: 804.58 MB
10/15/2017 2:07:13 PM |  | max disk usage: 4.90 GB
10/15/2017 2:07:13 PM |  | suspend work if non-BOINC CPU load exceeds 30%

Questions
1. I see that BOINC is running 1 task per 1 core, I'd like it to use all cores per task, what should I do?
2. How jobs size at grcpool is calculated, can I change job size?
3. There is an option to collect money from BOINC-users and rent supercomputer instead of buying home-level rigs and paying bills for electricity (or even renting clouds personally). Would it be more cost&time effective?

Problem: my Radeon x1150 driver version is 8.282.2.1 but "No usable GPUs found"

1. I see that BOINC is running 1 task per 1 core, I'd like it to use all cores per task, what should I do?

Find a project that has multitasking multithreading applications, else it's quite normal for each CPU core to run one task.

2. How jobs size at grcpool is calculated, can I change job size?

I don't know what you're talking about. Best ask at Gridcoin's forums.

3. There is an option to collect money from BOINC-users and rent supercomputer instead of buying home-level rigs and paying bills for electricity (or even renting clouds personally). Would it be more cost&time effective?

Also, I don't know what you're talking about. Where is this option to collect money from BOINC-users? Who collects it? If you, isn't that a scam, when other BOINC-users pay you for running work via your account on external computers?

Problem: my Radeon x1150 driver version is 8.282.2.1 but "No usable GPUs found"

Your Xpress 1150 is a graphics card, not a general purpose graphics processing unit. In other words, all it can do is calculate the graphics and output those.

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Touché. Multithread it is then.

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